Slow download at games?

For me was at the beginning on steam 10 mbits arrived then I changed server and then came 80-90 mbits but if I now other stuff in goggle download or epic games fortnite down load synonymous only 10 mbits and there's no server change or something

Right, you've already recognized it. You can't change the server and you have to accept the speed that Steam gives.

However, I have never experienced here that it is appreciably slow? Possibly. Check your own line again and make a speed test.

Try to download Steam at different times via Steam.