kinda the point? You consider losing a single capitol ship on the offensive, as the game was ending, a weakness? You failed to point out they spent the last hour focusing on the marza and never killed it.
Again, I feel like we're arguing two completely different points. TEC's greatest late-game strength is their early-game strength. You were carrying forward a nearly insurmountable advantage from earlier in the form of superior forces, capital ships, and empire. Getting ahead early and staying ahead late is TEC's game, and no one's arguing that this approach is weak.
The point I'm making is that TEC is reliant on this monentum to keep their edge. They lack many of the powerful tricks of the other factions. If that had been an enemy TEC on the defensive rather than Vasari, there wouldn't have been phasic traps there or anything like it. I sincerely doubt a TEC player in that position would have had even a remote chance of taking down that Marza. Without that significant early-game edge, TEC doesn't have the same powers as Vasari or Advent.
that TEC survivability ... is the best in the game
Early and mid-game I'd totally agree; those hoshikos are inexpensive and very good at what they do. However, into the late-game they're overtaken by the other faction's support cruisers and fleet support capital ships. Between repulsion, shield projection, shield restore, telekinetic push, and vertigo, Advent should be preventing you from hitting sensitive targets and absorbing or blocking the majority of the incoming damage. Vasari should be presenting a serious threat with subverters and punishing focus fire with overseers, which in the hands of a skilled player can far surpass the hoshiko.
You gotta go all bombers to kill TEC star base, you cant build a assault fleet or you will lose it.
If the TEC starbase is guarded by a significant frigate force, then sure (though to be honest, even Ogrovs will have trouble if a Vasari or Advent starbase has defending units supporting it). If it isn't, just send in a moderate wave of units to pelt the starbase, small enough that detonating the starbase isn't going to do anything for the TEC. With a battleball and sufficient antimatter, Advent should be able to cleave through a fully upgraded TEC starbase with 20 Destras. Detonating such an expensive installation to kill a mere 20 destras won't be worthwhile, and the Progenitor will survive the blast.
On the other hand, TEC has by far the hardest time of the three factions countering hordes of bombers.