I really enjoy FNaF series for what they are. They're a nice change of pace from generic horror games where you walk around collecting stuff when occasionaly encountering an enemy.
First FNaF interested me greatly in it's lore and theories when I found the gameplay quite lacking, but FNaF 2 makes up for that. The gameplay is new, fresh and interesting and it's more chaotic than ever by the third night.
I can understand why some people may dislike this game, but disliking it simply because "there are jumpscares in it" is just really fucking dumb in my eyes. Both games don't abuse the jumpscares and FNaF2 has better sound design compared to the first FNaF, meaning that the screamers are not as grating on the eyes while still having an impact.
I personally don't find FNaF1 or 2 too scary but FNaF2 is genuinely fun to play, especially if you don't exactly know the game mechanics.