Smegmale

I started getting randomly disconnected from 1 character then made a bug report on another about it. Started getting streaming error and notices my Firestorm folder went from 50-ish gb to 60+gb and when i tried to open the client again i got an error which was "Your World of Warcraft installation is damaged. To learn how to repair it, see: https://battle.net/support/article/6572". Anyone experienced something like this? I tried to replace the .exe and still the same issue. Can someone please help?

Im sorry if i missed the forum or the topic but i cannot log into the game, i got shadowlands and i tried with both email and account name but it just says "We couldnt log you in with what you just entered" can anyone please help?