Meh. I’m currently studying in seminary and I’d say that seminary formation is fine, at least in my seminary (can’t speak for every seminary though.)
Pre-Vatican II seminary formation had many faults and often wasn’t set up to properly form men in matters of sexuality and celibacy. Add to this the fact that seminaries were often de facto cloisters, and you have priests getting ordained who were often sexually stunted in one way or another.
Post V-2, the pendulum swung dramatically the other way, leading to seminaries full of open sexual immorality. Also not good.
Over the past 20-30 years, things have slowly been coming to a healthy balance. A big step was John Paul II’s letter Pastores Dabo Vobis , which significantly reformed seminary formation. Current seminaries, in my experience, are seriously committed to forming healthy, balanced men.