No doubt, there is certainly some 'care and feeding' when it comes to particular TC drivers. I have experienced a couple of those same issues you've mentioned. But I've learned from that and chosen the ones that suit me best. I've found them to be more than rugged enough for my needs, but it's true, they don't seem to hold up to abuse all that well. And I'm okay with that. From the start, TC was never about holding up to abuse. They paved the way for high excursion drivers and were all about linearity, dynamics, and the music. You don't get that with 6 ultra-stiff stacked spiders for the sake of throwing 10k at it. You get a driver that sounds lifeless with low level detail and doesn't really come alive until there's gobs of juice being dumped into the coil (coming back to thermal compression).
There's usually a degree of discipline and compromise involved with all aspects mechanical and electronic devices. You shouldn't just expect to show complete disregard for the limits of anything and then complain that it didn't hold up or it had issues.If glues let go, that's ******, and I've had it happen. Same driver you mentioned, I believe. But if lightweight cones designed for musicality are getting folded from over-excursion or even blatant over-wattage for burps (fuggin stupid anyway), it is obviously on the user for not respecting the limitations and intent of the design.
I hear you, though. You're right on many of the points you listed. I've had a lead let go and things like that, but those issues aren't unique to TC. It affects many. Regardless of brand, it's just plain awesome to have the feeling that your equipment is going to hold up no matter what. I'm glad you found a brand that suits you. Luckily, I listen in a way that allows me to have that feeling with TC Sounds stuff. Anyway, I'm fuggin babbling. It know it sounds like I'm desperately trying to to defend TC but I'm not, I've been burned by them. I'm really just trying to differentiate the fact that it's always been more of a mismatch between the user and the gear. To TC's advantage, it's what drove many of the advances in some of their products, like the titanium cone and thicker leads, etc... They were responding to the complaints from people who weren't always using the drivers as they were intended.
The Infinity is a good mention as well, excellent drivers!