I have had someone access my account, play a few games, changed my settings and spend some in game currency. I've changed my password, buy how else can I prevent this from happening? How were they able to in the first place?

Pls stop its insane how this game on eu is full of afks and rage quilters I can't play valorant anymore I don't like to play with friends either because they are irons so silver gold needs to be fixed these large amount of griefers who nev...