With the benefit of a few years in a jet, with hindsight, I'll agree with you. I look back now and wonder why I ever thought training was hard. I now find flying piston GA to be harder than flying the jet (weather is much more of a threat, the airplane is much more susceptible to turbulence and is far less capable than the jet, you actually have to do all the flight planning instead of looking at a release, etc etc.)

But I have to tell you, halfway through my initial Systems class I thought my head was going to explode. And I have two master's degrees from a rather well-known university in the UK that's been around for about 800 years. Nevertheless, initial Systems was the hardest I've ever had to study for anything. Not trying to sound arrogant, just pointing out that drinking from the firehose is startlingly difficult if you've never done it before. I guess it could also be that I entered regional training 20 years after getting those fancy degrees, so I suppose my brain was a bit mushy...

(It probably didn't help that apparently I took Systems wayyyyy too seriously since I got 100 on the test and found the test to be a breeze. But halfway through the class I thought I was going to flunk out. They train you to a much higher standard than they actually test you. Wish I'd known that!)