OK. I read the whole thing. It was very long winded, you could have bullet pointed this, and I think if you had you would get a much better response. That said, I agree with a lot of it, but when it comes down to it I just don't think this is the game for you.
It is a very cookie cutter, gear treadmill, nothing-but vertical progression MMO where the roles are homogenized the jobs are all the same character to character. The difference between players' characters comes down to skill alone. Yeah, Joe Blow and Jill Shill have the same level 60 monk with the same build, but Jill makes the class shine in savage, being top dps in her group, and Joe is doing ~800 in A1 normal. They have the same potential, but they certainly don't play the same. And while I agree that job rotations are rigid and unforgiving, there are classes that do not adhere to that, or as much. Healers certainly don't. Machinist doesn't. Summoner doesn't. Now, yeah there are strict openers and their freedom just comes down to a priority system, but those classes are freer than Black Mage, for example, and they're actually mobile. So there is an element of choice in choosing a dps that isn't going to have you mashing the same buttons in the same order, in every single fight. This is actually why the only classes I've ever been able to enjoy in this game are healers, MCH, and SMN.
I don't necessarily agree that Yoshida is a lying evil bastard like some do, but it's apparent that he doesn't really love this game. He doesn't want to create memories for the players or bring innovation to the market. He wants to make SE money. Do we deserve better? Probably. But FFXIV isn't going to change in the foreseeable future. It has its model, it's going to stick with it. Because it's profitable. This wont, in the end, be the MMO that people remember in 20 years. It won't change the genre. It is what it is, and the people who are loyal to it, I think, are aware of that fact.
The magic in this game came to me, not from the combat dynamics, but the epic and beautiful feel of conquering Coil. The only reason I'm still playing is in hopes that they recreate that somehow after they realize (as Im sure they already do) that the 3.0 cycle is a massive failure.
I think you're quitting for the right reasons. And I think you accept a lot of things other people don't. {Have a safe journey!}