What is fun for you? pressing some random buttons without a second thoughts and watch pretty pictures and colors play out on the TV?
I'm being reductive with that sentence, but dismissing the intent behind skill gaps in a video game is just as reductive. There is an experience crafted by the developer that asks from the player to engage with it, if you as a player don't wish to engage in what the developer asks, then you don't like the game, you don't like what the game offers.
Getting through a "zone" dozens of times is not cheap, maybe it's challenging but cheap is not a given. If you don't find challenge in a game to be something worth your time than you probably should save yourself the trouble and play the games that cater to that same opinion. If you want to criticize the difficulty of a game, then you have be a little more nuanced and be specific about what feels unfair to you and why, if not, the there is nothing of valued gained from that "opinion".
Jaffe is wrong because what he perceived as "cheap" or bad design, is the complete opposite and blatantly obvious to most players. There is intent in the design and it works as proven by the hilarious montage, i've watched some of Jaffe's playthrough, he is not the sharpest tool in the box when he streams and he usually says that it's because he is reading chat, but you would be surprised how often he doesn't understand basic mechanics even when reading a tutorial.
Just as a side note, difficulty being something that keeps players away from games is the biggest lie in the industry regarding game design, people chose to play difficult games all the time, the real barrier is making the game appealing enough for someone to try it and stick with it.
Just look at the most successful games on the market, LoL and CSGO are not simple, both games have a really high barrier of mechanical and planning skill, most fighting games keep you at the entrance on the kids table until you learn basic motion inputs, yet all of this games have incredibly big player bases that stick to them for years, because getting better is fun, and nobody gets better without engaging with the gameplay first.