To quote my DD in the midst of Plebe Summer: “The highs are really high. The lows are really low. It’s great to be here. But it really sucks.” She was no doubt speaking for most (all?) of her fellow plebes.
As the Supe says, it’s “positive pressure with a purpose.” The detailers aren’t mean or cruel. They’re there to introduce you to the discipline, focus, perseverance and resilience that’s required to get through four years at USNA and five years (at least) on active duty. The detailers want to show you that to lead effectively, you must follow effectively. They want to reveal your weak point, so they can show you how to overcome it. And they want you to fail at something, so they can show you how to bounce back. (Now, if a detailer makes you want to laugh or smirk, more power to you. But that proves nothing and won’t make you a better midshipman or officer.)
The people who’ll intimidate you likely won’t be the detailers. Instead, it’ll be your company mates — and the prospect of letting them down. What I mean is, you should be intimidated by the possibility of not pulling your weight, not doing your part, not achieving the standard, not coming through for the team. I believe for my DD, it’s that which motivates her, not any yelling or screaming from the detailers.
Regardless of what you experienced at Summer Seminar, should you be so fortunate to make it to Plebe Summer, you’d be well served to approach it with humbleness and humility and a deep desire to help your shipmates.