I will forever be grateful to my upbringing as a Mormon kid. I had a wonderful childhood and young adulthood, and even as my wife and I raised our kids. BUT: I had it EASY as a Mormon. For three reasons:
1) I am a male. Not saying that no women are happy in LDS culture, but the culture and doctrine is extremely patriarchal. You're very inculcated growing up, and as has been mentioned already the teachings tend to insulate you, so it takes a long time - sometimes forever - for a girl to realize exactly how kept down she is by the belief system. It's not so bad for a young man, which is a terrible thing, but true. You've got Boy Scouts, you're in the priesthood at 12, all the lessons at church basically tell you that when you mess up and touch yourself it was probably a girl or woman's fault for being immodest (sorry to be graphic, but it is what it is), and that's all the modern church, forget about polygamy: women - multiple women - need you and your priesthood to get into the Kingdom of Heaven and be reunited with God. And your current spouse, if she don't like it when you get there and other women are supposed to marry you - well she just gets in line or gets destroyed. Easy to be a dude in the church (unless you have a conscience.)
I honestly don't know how any woman was ever in or stays in.
2) My community was almost all Mormon. Being LDS just felt natural to me growing up because there were so many other members where I lived. The church does a lot of heavy lifting for a kid in those cases: it creates social situations for you like church dances and activities. It gives you chances to excel (singing, church sports, scouting, etc.) and then praises you, telling you over and over how important you are to God and to your family and to the girl you haven't married yet, etc. It does also create a lot of expectations (or can) that can be heavy, but all in all, you're a little kid, and you learn to sing, to be social (at least with other members) to speak in public, to do well in school, etc.
3) My parents. More than the church, my parents were important in my happy Mormon upbringing. I say this because if I'm being honest, they kept me from having some of the trauma that I have heard others express. My parents were church leaders in our ward (congregation) but there are Mormons, and then there are Mormons. My dad in private talked about the sexism rampant in the church. Didn't like it. Talked about the racism in old church doctrines. Didn't like it. Told us it had to have been wrong, and he would not accept that it could have ever been God's will in any way. Talked about the insular nature of a lot of people in the church, and how wrong that was. They encouraged us to have friendships outside the church, they didn't like how kids in the neighborhood were excluded. And on and on. When you know these things are wrong, but the official doctrine and/or the unofficial policies of the church are still supporting and affirming that those things are NOT wrong, it creates a lot of internal conflict for folks. More on that further in this long process.
NOW, I want to be careful as I do this, but I do want to be honest. I want to be careful because religion and spirituality are delicate and important things, and very much personal in my view. In being honest, the last thing I want is to offend someone's belief or give the impression that I hate religion or the religion I have lived my whole life in. Nothing could be further from the truth. Most Mormons, like any members of a religion, are wonderful people who care about others and want to make the world better and live their best lives. I respect them, and I always will. With that said, I have to be honest in my assessment of the doctrine that underlies some of the wonderful (and not so wonderful) culture that Mormonism created where I live. Sometimes that's not pretty. Typically, as members, I've found we just don't like to really talk about those things much. That won't wash for my Gen Z kids, and so it can't really wash for me. Not anymore. So I'll be honest as we all talk, and hope I'm not offensive. It's interesting stuff.