I'll take these in turn, having played to mission 37 myself.
- most of the main missions are fetch quests, just filler
- almost every side quest is also a fetch quest, but a smaller one
- the game is LARGE, so these two flaws make the game very repetitive
I think your definition of "fetch quest" is a little too loose here. Most of the missions involve either destroying something or simply reaching a certain point. It is "go here and do this," but if that qualifies as a fetch quest then just about every single video game ever is a fetch quest.
As for the missions that are extractions, I find that I don't mind them because the challenge within the fetch quest isn't finding the object (which is what made fetch quests in games like Wind Waker obnoxious), it's figuring out how to get to it. Observing the area and figuring out how you want to stealth or where you want to initially attack if you're going in guns blazing. That's what makes the game enjoyable to me, and the actual mission structure isn't a bother so long as that core gameplay still exists. The missions I found myself disliking the most are the ones where the game subverts that general structure and forces you to follow a set of arbitrary rules (like coming in with no weapons or never get spotted)
- the open world is inconsistent and offers nothing by itself. It's a huge level and the missions play on little chunks of it. Outside the missions it has nothing. No random events, no outposts to free, no militia, no civilians.
...I really don't understand this. You can explore the world freely, and you can interact with all the outposts freely when you do. There are even some entirely optional prisoners you can rescue. With that said, though, even if the open world did offer nothing, would this really be a problem? You've got at least 40 missions (throwing out the ones that supremely confine you) to interact with it. There's plenty of opportunity within that.
- you DO have a lot of freedom to finish missions, but you will get rewarded the most if you play the non lethal way, stealthy and extracting soldiers. So most players will feel restricted on the way they do the missions.
...so the game rewarding the player for playing the game it's meant to be played is a problem? You might as well be criticizing Devil May Cry for giving poor style ranks to the player who just stands back and spams guns the entire time.
- the story telling is just a joke, sometimes it's slapstick goofy like, the next time over dramatic. Most of the time Snake is an emotionless, speechless avatar, but other characters hold some unenjoyable non-sensical monologues. (This is just Kojima style, nothing new here, but now even Snake isn't likeable)
- The first ending, where you face the main villan, is just an awful joke. (REVEEEENGE!!
)
- Credits before and after every mission. Credits before the mission spoil every character that will appear in that mission. But hey the name Hideo Kojima appears like 300 times during the game, so it's worth it!
- During some intense moments you get a "to be continued" screen (for example while being chased or attacked) then you can go back to mother base, do side missions, etc. Then go back to being chased. WTF??
- The story itself doesn't take itself important enough, so instead of cutscenes it tells its majority through cassettes. Well if you don't give a fuck about what you're trying to tell me, I don't either.
- And then after it seems to end, it goes on by reclycing missions until I get the true ending? - So I have to save this person I already saved again, this time under more difficult circumstances, to advance in the story? Ok, makes sense.
- Quiet, quiet, oh boy...her whole presentation is just embarassing and I felt like a perv watching the camera zoom to her boobs every 2 seconds. And that "side mission" in mother base where she's locked up in a cage and you watch her shower and get her bra off (of course, why not take off my bra in front of some old pervs who hold me as a prisoner). OMG. Like watching an animal in a zoo...
- I really felt insulted by this. I don't buy your game to jerk off to some barely clothed hot chick with big boobs, Kojima!
I agree with most of the story complaints, as it's been pretty underwhelming so far, but to me I don't mind it that much since the gameplay is very much enjoyable. There's so much room for player freedom and creativity. A number of things are very odd (like the credits sequences), but they don't hold the game back or really affect the experience at all. Quiet was definitely a missed opportunity, but if you feel this is insulting, it might be worth getting some thicker skin.