so I dont know which one fixed this for me because I forgot to test it out after enabling opera://flags/#ffmpeg-demuxer-everywhere and Shared Start Page and Override software rendering list. Then I Debloated My windows 10 and it helped tremendously for me atleast twitch doesn't lag anymore video Pop Out doesn't lag anymore etc. https://www.youtube.com/watch?v=mWHiP9K8fQ0
I dont know which one did it but just enable all and debloat windows 10 hopefully it works on future people who gonna watch