Probably because you have different preference. It’s a forum dedicated for altcoins so it’s obvious that they will have many sections since altcoins has a vast scope compared to Bitcoin.

I agree that Altcointalk forum is kinda messy when you compared it to Bitcointalk because this forum is made plain and simple but there’s always a room for improvement to correct the flaws especially now that there’s some user that teleported in there. I don’t see it as a competitor but rather just a different forum dedicated for altcoin since altcoin discussion here is too generalized due to lack of section and category while there’s tons of altcoins.