I ran my first D&D campaign last year for 8 players (too many I know, but they really wanted to play). One player was super excited and made a detailed character and background. Long story short, the game ended before all its threads were tied up, mostly because I expected to continue this summer. The enthusiastic player was really unhappy with being unable to complete a story arc involving defeating his evil brother and father (the campaign's villain).
Now he's running the next D&D campaign. I got all excited and wrote a detailed backstory that tied my character's backstory into his NPC, but now he says that he wants me to feel the same pain he did. I'm sure he's going to make a mess of the backstory I put so much work into and do bad things to my character.
What should I do? I'm thinking of just playing like I don't care because all this has made me lose interest in his campaign. I'm also thinking of not inviting him to play in the one-shot I'm going to run in August.