No doubt. It is a demanding religion. Those I know who have left have left because they weren’t willing to live the moral rules, or pay tithing. The justifications based on disagreements with doctrine came later.
That’s probably true of some.
Some are genuinely turned off by the beliefs and practices.
Fine.
I used to be Catholic, but when I left the Catholic Church I didn’t spend all my time in ex-Catholic websites or support groups, discussing how much I dislike the Catholic Church (which, in all honesty, I don’t dislike).
At some point, one needs to move on. Focus on the future, and quit griping about the past.