Why is the community so split?

I want back in. But I left after Legion, essentially back when there was 1 WoW. Only one game mode. Everybody played and enjoyed that game mode. Queue times were basically inexistent and everyone did everything. The fact that a simple BG queue takes 15+ mins today, because there s like 5 Classic instances of WoW besides retail ia just making me puke. It makes me not wanna sub again. How do y all manage these sentiments?