Why did season 2 suck so much?

Why did season 2 take a horrible turn?

First, why did they make the kids such assholes. Horrible character writing to make the kids act superior to the alien that could kill them.

Second, I liked how they wrote the female characters in season 1 but now they are so unlikabel that I can’t even stand them.

Third, why is harry so different compared to his season 1 self, I can’t explain it but he is very different.

Fourth, we see how the whole show turns away from the main character a lot. I hate how they barely show him now in the episodes, like seriously if you’re gonna do character building then do it in the 1st season.