*slow clap* I totally agree, Yahtzee. The game shouldn't start getting good 10 hours in. Would you have sex with a cheese grater if somebody promised it "gets good" 10 minutes in? I don't think so. It's the same excuse as, "She's nice once you get to know her." It's another way of saying, "She's a ***** and has no social skills, but she isn't half as mean to her friends."
A good game should be good from beginning to end. The tutorial shouldn't be terrible, nor should it be 10 hours long (if it takes 10 hours to explain how to play the game, it is either too complicated or you need to learn how to explain things better).
I swear that some of the people defending these games are suffering from Stockholm syndrome. They paid so much for their games that they have to see them through to the end, and once they get past the 10 hour mark, even the slightest improvement seems like a blessing, because they've become accustomed to such horrible gameplay the rest of the way through. It isn't fun or entertaining, it's servitude. They play the game because they have to in order to justify the time, money, and effort they have already invested in it.
PS: I haven't tried Monster Hunter Tri, nor do I intend to. If it really does take 10 hours to get "good", it isn't worth my time.