As title says: when downloading a game in steam it kills my internet connection. I would like to fix this issue.

Downloading from any website with browser or other game clients like origin, epic, blizzard is not an issue and it goes at max speed most of the time. but when I download in steam my internet connection drops after a few (2 or 3) minutes and I HAVE TO RESET MY MODEM AND ROUTER to get the internet connection back up.

I have found several "solutions" but these aren't a fix. I have to set a download limit of 4 MB/s and if that doesn't keep the connection "alive" I have to go even lower, 2 or 3 MB/s. So this is not a fix. Downloading games of 50 GB will take a lot of time this way.

Other "solutions" involve disabling internet sharing on a WiFi connection, but I am using a wired card so I can't find this option.

Other "solutions" I find have you delete steam cache and changing "regions" but this is not a fix. This does not help at all.

What can I do to fix steam download issue?

I am using Win 10 64bit