In an anarchist utopia, people will do things you don’t like, and there’s nothing you can do about it. Buildings will be repainted in colors you don’t like and trees will be planted in places you don’t want. 100% consensus isn’t feasible in large groups. Learn to live with it.
Outside of actually harmful behaviors, don’t try to control people. Go forth and create things too instead of preventing others from creating. You’ll be so much happier once you give in an accept that the world doesn’t revolve around you.