Three things I hate

Predictability -- Animals act on their instincts, and in fact, just because we SAY we have our own choice, does it really mean we do? Look at the past 6000 years, what has really changed besides for technology? We still fight with each other and do stupid things. Just look at everything from an omniscient view, and you'll see what I mean.

Dopamine -- It makes us do things to get happy. Genetically remove it from us and we won't be addicted to anything, be it money, power or drugs. On the other hand, we wouldn't want to reproduce, but that's just a side effect.

The moon -- It causes female menstruation, which sucks. Blow it up, we don't need it anyway.