The AA range is insufficient to cover allies, and the AA power is insufficient even with a full AA spec and sector reinforcement on the correct side to prevent a drop.

As the match progresses and texas gets set on fire again and again, 90-100% of its AA mounts die, but the CV attacks come the entire length of the game as thick as from the start.

It's not unreasonable to expect a premium ship sold on its benefits of having a strong AA suite, to actually have a strong AA suite.

During World War II, she received powerful AA armament.

Texas boasts more than three times the anti-aircraft firepower of New York; indeed, she has more AA power than any other battleship of any nation until North Carolina at Tier VIII

Pros:

• Best-in-tier AA defense, but with a limited range; in fact, Texas' AA firepower is higher than any other battleship in the game prior to Tier VIII. Enemy planes that come near Texas are highly unlikely to make it back to their flattop.

-- WoWs wiki