I'm actually enjoying Metal Gear Scanlon 3, mostly because I love MGS3 above almost any other game, but I do feel this is a sore point for lots of people.
MGS3 is a MUCH slower paced, methodical game compared to MGS1 and 2, which both usher you down critical paths (2 much more so than 1) while MGS3 is all about exploring, experimenting, taking your time.
The problem is, Drew thinks that he needs to get through things as fast as he can, either for a performance sake or because he wants to just get to the next story beat. And it is killing me to see him (and viewers) sour so quickly.
I just hope someday Drew would play Snake Eater by himself, and write up a response then or something. But now, I could easily see them stopping due to outside and internal pressures. Because as terrible as they are, it seems the crew and the crowd would much rather watch them suffer through terrible Demo Discs.