Discussion between me and my N+1
(Note : I'm in the company for 3 months)

Me : As the tech leader, shouldn't you review my code ?
N+1 : I'm not the tech leader.
Me : Wait what ?
N+1 : I wrote the app from A to Z, hence I'm the architect.
Me : That's what I mean. Being the most knowledgable dev in the company makes you de facto tech leader.
N+1 : No, I'm not the tech leader. The CEO is.
Me : But he didn't even know the tech we are using !
N+1 : .... Anyway, I won't do code reviews. I don't like that.

(2 hours later)

N+1 : You made a mistake in the code. You broke a hidden functionality. You should be more careful, or ask me if you have doubts.

This guy is collector.