I won a game and my rating went down

So you won a game as “9k” (most of your games are bot games so who knows) against an absolute beginner and you expect to receive points for that? You should be ashamed of yourself.

You also lost an almost equal 19x19 game recently, which took you from 8k to 9k. Then you played a 13x against a bot - as you do frequently, and an unranked nonsense game.