I suppose you havn't had a hold of an HTC device recently? Because what you're saying really shows that. 1. Wrong, just hold the One X and the GS3 in both hands, you will immediately ultimately notice how far the One X is more premium, HTC has put a lot of effort in its design and it just feels and looks great and blows all other flagships from the competition in that area.
2. All custom UIs are bloaty as f**k, this isn't an HTC related problem, still, HTC offers a really easy way to unlock your bootloader via htc-dev.com, install CM10, done.
3. You said it, all are as slow, that's what custom ROMs are for. 4. They are amongst the few who support unlocking bootloaders without completely ruining you warranty via some very simple steps on htc-dev.com! C'mon man, watch the news! 6. I would love some examples, I see non of that in practice, though I agree that the One X+ was lunched pretty sooner than expected, but that isn't necessarily a problem.
7. How on Earth..? Just observe the One S for instance, awesome hardware, JUST AWESOME, with a f***ing awesome price!
All in all, HTC has been and is still strong, I wonder what made the OP think that out :|