well when i finished a game well like 10-20 games i founded out that i cant delete them (so they don't show up at any filter) or maybe i can thank you

Set your default sorting method to "Active Games" or "Games where it is my turn" or something.

They aren't hurting you, and maybe some day you would want to go watch some of them.
I've gone back to see how terrible I played in the first couple of games, and I've also gone to see where and how I can improve my ability.