The Federal government enforces a few rules and then leaves things to the state and people. Obviously that means the state and people have no nanny to protect them from consequences of their decisions. If they drain their budgets fighting the civil rights of their population instead of fixing a problem then they might look like a lot of bankrupt municipalities. The US is obligated to let that happen.
Not really. The federal government bails Texas out of the messes they get themselves into all the time (like their shitty power grid). Historically, Texas has often received more in federal funding than it contributes in federal taxes.
This is true, but Texans as a whole keep enabling these outcomes by both voting and supporting politicians that create it, as well as the state as a whole generally refusing aid.
It's one of the (many) reasons why I immediately moved out of the state when I had a chance. There's only so much that can be done when a lot of the states politics and environment is wholly self-destructive.