1. Crowd Control (CC) such as Stuns, Hex, Disables or at least Silences.
If you pick a hero with CC you have a chance to disable the enemy damage dealer/Team. If he is disabled he can't rape your team and your chance of winning increases, especcially because your teams Damage Dealer can deal loads of damage in that time. Great Heroes to pick are for example : Magina, Bloodseeker, Nevermore or Weaver. I'm not saying that you will loose always when picking these heroes, but as soon as there are more than 2 of these heroes in your team, your chance will increase greatly.

2. Carrys
You have two options of increasing your chance to loose,
Option 1: Pick more than two carries. Main Reason: Carries need farm, and you won't get enough if there is more than one carry in a lane + Carrys normally don't have such a great lane presence, all they normally can do is autohit. So your first Option for a loss is picking about 5 carries, none of the carries will get farm, and every single one of them will be useless.
Option 2: Pick no carry, even if it can work when you have a great pusher lineup, it usually won't. Because you don't have damage in Late-Game.

3. Supporters
If you want to loose, you have the same options as there are for carries. Option 1: pick too many, because supporters won't deal enough damage after minute 25-30. Option 2: pick none, because who cares about the early game.

4. Squishys (Heroes with very low standard health points)
As you can figure out yourself, if you wan't to loose avoid to pick tanky heroes. Squishy heroes die much faster, and if you have 5 Squishy heroes in your team your chance of loosing increases greatly, because the enemy can slay each and every single one of you very fast.

1. Do not play your role in game.
If you end up playing a hero you should know what his job is, and do the exactly different.
example 1: if you are playing support heroes which normally are not item dependant, you should try to get as much farm as possible so you can buy useless items, and the carry or initiiator can't buy their stuff. A well farmed Wisp for example won't lead your team as much to a win as a well farmed Chaos Knight or Faceless Void could.
And if you play support never ever buy wards, a chicken or its upgrade. You should know that it's way more important that you get your dagon to steal the kills, which increases your income.

example 2:if you are playing ganker heroes like nightstalker or rubick, stay at your lane and never think about helping the other lanes, these noobs have to deal with their own enemy. Even if your lane-enemy leaves the lane, be happy about the farm you get freely. This is important because you get weak in late game even if you are farmed, and if you want to loose like a man, you can even say "look at my gpm" afterwards.

example 3:if you play a Carry, do not attempt to lasthit the creeps on your lane, because that would give you money, and you do not wan't money. Besides it is very important to act like playing a ganker, run from lane to lane, and try to kill the enemys on other lanes. Do not attempt to lasthit the creeps on your lane, because that would give you money, and you do not wan't money. Because even if this tactic works out, you won't get enough Experience to stay at the same lvl as the enemy carry. And you will get destroyed in early, mid and lategame. [This is extremely effective]

example 4:if you play an Initiiator, you have 2 options of beeing useless: nr1.: Go in fights when no one is behind you to follow you. The great thing about that tactic is that you can blame your team that it never helps you, even if the initiiates are perfect. Nr2: Don't show up at fights or go in extremely late, so your team will fight 4v5 which is hard to win, or you will get all the kills and get all the money you wan't to buy useless stuff, like a dagon, for stealing more kills.


2.Teamfights
There is an very easy way to loose a game very fast. Go in Fights when no one is behind you, especcially when you are the most farmed hero in your Team, so the enemy team can kill you and take out the rest of your team afterwards. As I said at "initiiators" it's easier to fight 4v5. Of course you also can decide to join lost teamfights. This is my favourite way of loosing games! You were somewhere else when some guys of your team started a teamfight, after one of them is dead and the rest of them is fleeing in panic with 1/3 hp, you just jump in the middle of the enemys. This will have 2 effects. Effect nr.1 Your Team thinks: "Oh we have a chance let's turn around!" Effect nr.2 You all will die.

3. Gamethrowing
Even if the Teamfight tactics can work out to throw a game, they don't always work. You can still buy some Items which will help you to loose games. For example Dagon 5, which is incredibly expensive compared to it's effect to a game. If the enemies are still too bad to kill you, you still can buy Divine Rapier(s) and loose them due to greedy pursuit into the enemy jungle.

4. Minimap
Do never ever look at that nasty little thing. It can tell you if you are getting ganked, if someone needs help of if you can get an easy kill. Just don't look at it. In addition to that avoid to say miss if someone isn't there because it could make your teammates more careful to ganks which would prevent them of dying.

1. Language
http://cloud-2.steampowered.com/ugc/560967557555606241/188492A4337478FAA22971E24959989BE826F663/256x0.resizedimage
There is one way to make your teammates aggressive before the game starts. Just try to speak your native language, especcially when no one else in your team speaks it. An example for getting People mad at Minute -1:30: "колбаса лакомый колбаса". Even if no one understands it it will tell your team "Hey I'm russian and I don't want or can speak English, and I don't want to play on the russian server because I'm a badass". You will get instant-hate. Of course it's not just the russians, it's also the french, german, turks, brazilians etc. I guess every Country has it's "do not speak english-kiddies" Pick the language you can speak best. But russian will make your Teammates most mad, because they can't even read the letter and try to understand what you have written.

2. Flaming
Don't get me wrong critique can be useful to win games. But if you want to lose just flame for every litte mistake your lanemate or teammates make. For example: "YOU STUPID *** WHY DID YOU PICK A CARRY YOU ALREADY MISSED 2 LASTHITS!?!!?!? wtf?!" This will increase the adrenalin level of your teammate which will cause him to miss more lasthits. Very productive if you want to lose.

I'm sorry if there are language mistakes. English is not my native language. If you have any constructive criticism, don't let me know.