I am in love with this game. This is the MGS I've always imagined ever since playing MGS2, which blew me away back in the day. The difference between MGS and MGS2 was staggering, and I believe a similar shift just happened with MGSV.
As great as MGS3 and MGS4 were, they were fundamentally rooted in the template laid out by 2. Hell, you could say the entire series up until this point was anchored by the design principles of Metal Gear 2 on the MSX2.
MGSV completely rewrites the rules. This ain't no evolution, this is revolution. MGSV is the culmination of all the design elements from past entries. Simply put, this is the ultimate Metal Gear game.
If you're not enjoying MGSV, you're doing it wrong. The game is what you make of it. It's all about options, and not even the most optimal ones. Take joy in experimentation. Don't play how you think it should be played, play in every way possible. Think outside the box, or in the box, and with every box, because MGSV is the ultimate sandbox.