From my experience, and perspective, there's merits and flaws to everything. Things are always more complex than they seem on the surface.
There are things I like about FnaF, if I must use that as an example. Like @Chronicler said, a lot of them, as games, are rather formulaic. Once you figure out the systems, it depletes the games of challenge without resorting to pure randomness, which can be frustrating. The jump-scare thing I only half agree with. The series more times than not does a good job of being genuinely unsettling; the jump-scares are moreso a failure state in terms of game mechanics than any real attempt at scaring the player.
The series lore, while messy and often incoherent, is still appealing. There's a lot of mystery that keeps people guessing, wanting to know more. I'd aruge the extreme ambiguity is what sort of allows people to fill in their own details, make things even more frightening. Taken as individual games too, each entry in the series has an intruiging premise and a deeper mystery.
Despite those flaws, the series has garnered mass popular appeal, so it must be good at something. You don't get to that level of fame by being trash material.
That being said, I don't find the flaws "cringey." That isn't to say that there aren't cringe-worthy things out there, though. Either way, it is true people will use their positions on certain things to bully other people; it exists everywhere. It's a sad, but true reality, but one that everyone has a part in. So long as you yourself strive to ensure positivity, then it can help inspire others to do the same.
My two cents on the criticism debacle: @Chronicler is right. By definition, there is no way to criticize without pointing out flaws. However, there are distinct differences between being critical and being mean or abusive. Pointing out the flaws in something and using those as a platform to tear someone down as a person isn't helpful, it's just being mean. Pointing out objective flaws in someone's work for the purpose of helping them remove those flaws and become better is the job of criticism. There are right and wrong ways to go about it.
For example, if I said to @Chronicler, "I think you could improve on [insert thing here]. The way it's done in this example isn't as effective as it could be," or even "This [example] is bad, here's why," are all examples of criticism. One is phrased a bit more passively, the other a bit more blunt.
But if I said to him "This [example] is bad, and it's because you're incapable of doing it and are a bad person" or something to that effect, then that's not criticism, it's bullying.
@Chronicler I apologize for using you as an example, you know I love ya'!