so I have done a balance and rebooted and I'm still getting system unresponsiveness while downloading a steam game. Asked about this in several discords and this seems to actually be normal behavior when using a ryzen 5 with gigabit speeds?
EDIT: don't know why I find this github issue
so yes it is normal and can be solved by
not allowing downloads while playing a game
limiting your download speed to something lower like 200 Mbps in the steam settings