Maybe you joined a club daily match tournament?
Why is it starting daily games automatically without me pressing start a new game?

HOW DO I STOP PLAYING THERES LITERALLY NO ABORT BUTTTON
You can't abort tournament/matches. You'll have to resign if you don't want to play. Or let them time out which results in the same outcome.
I just want to play with my grandchildren but every time new opponents apear which I do not want to play against

I just want to play with my grandchildren but every time new opponents apear which I do not want to play against
Unless you are signing up for tournaments or creating random seeks, you won't get games with anyone. You may get challenged, but you can decline those.
In your settings you can set challenges to Friends Only and add your grandchildren as friends. Then use the friend list when sending challenges.
It’s so annoying, I have like 14 daily games going on.