These are all the main problems i could find just playing around and if you dont like the look of all these broken things, well then, dont get it. Here they are:

chainsaw sound volume too loud
chainsaw sound when put away still plays
thumb on spaz-12 messed up
iron sighs not where bullets hit on most guns (they are off)
reload sound on shotguns are too quick
when zoomed in and reloading remians zoomed
bash feature doesnt work
bash feature needs sound
when holding aim down sights button (since it is a toggle) gun repetivley zooms in and out ,instead of staying ads
most guns dont have proper recoil mechanics
meele weapons considered a bit too loud
bashing while aiming down sights should be disabled
bashing with meeles should aslo be disbled (bit pointless)
akimbo weapons remain in fired state after last bullet is shot
shooting the left akmibo pistol drains all the ammo pool (magazine) for both guns while firing the right one will still let you use the other gun when all the magazine is depleted
adreniline effects last until you die (should have a countdown)
iron sights over line of fire (cant see what you are shooting) when firing in fully auto for most weapons
some finger clipping issues on some guns and meeles
can see a tiny bit of arm on side of screen when swinging some meeles
guitar meele sometimes wont play sound staright after a follow up hit
iron sights on most guns eg. magnum pistol are too zoomed in
in third person muzzle flash comes from your head

There ya go.