How did the doll that gave john nightmares make the universe terminal?

If Gamzee didn’t chucklevoodoo up that doll in John’s dreams then he wouldn’t have draw harlequins on his wall and his dad wouldn’t have thought he liked them and bought him the harlequin doll and if the harlequin doll wasn’t bought it wouldn’t have been prototyped and if it wasn’t prototyped the Black Queen wouldn’t have made Jack wear the clown hate and Jack wouldn’t have killed her and obtained the ring.