Too hard for whom?
The most wrong thing anyone ever said about Pete Dye were the Tour players who said he didn't understand their games, and that they were not as good as he thought they were. He knew exactly how good they were, and courses like the TPC at Sawgrass and PGA West were built to make them show off their skills.
But, Pete also believed that the only way to really challenge elite players was to get under their skin, and he tried to do that every way he could think of. When players complained about something, he'd make a mental note to do more of that. When I was working on the plans for PGA West, he shared a bunch of that knowledge with me. The one quote I used from that time which I maybe shouldn't have, because he only said it to me as a worker and not as a writer, was a beauty: "When you get those dudes thinking, they're in trouble."
The first year they held the Players Championship at the TPC at Sawgrass, in 1982, it was the week of my spring break from college [and also my 21st birthday], and having worked for Mr. Dye the summer before, and having corresponded with Deane Beman for years, I got myself down there for the week. On the Friday and most of the Saturday, I just went around the course with Mr. Dye, one hole at a time, observing play, but staying just outside of where any of the players would recognize him. We would wait until someone got themselves in Position Z, watch them hit a great recovery shot, and Pete would say, "Well, that hole's playable," and we would move on to the next one.
The first year, the players in contention were either young guys who didn't worry about how hard it was [Bruce Lietzke, Brad Bryant, Jerry Pate] or very controlled players [Hale Irwin, Ed Sneed, and I guess you could put Lietzke in that category, too]. The marquee players all had a terrible week, and most of them missed the cut. They were just completely psyched out, after three days of providing quotes about everything that was unfair about the course.
I went back for the '83 event while I was home for a couple of months in the winter of my scholarship year, and I went out with Pete again to follow Jack Nicklaus on the Saturday morning, after he had barely made the cut. He started on #10, playing with Isao Aoki just a couple of years removed from Baltusrol, and Jack started off hot -- he shot 5 under par on the back nine. No one was happier about it than Pete, as Jack was proving that the course was playable. But after Jack made the turn he started playing much more conservatively, making a bunch of pars and a bogey on 8 to shoot 68, and that was the most upset I ever saw Mr. Dye. A great round would have shut everyone up about the golf course, Jack included, but he seemed to have subconsciously backed off from doing it.
It would take two or three more years [and a few more tweaks] before the big names got more comfortable there, and the scores really started going down.