What is even up with lawyers/prosecutors (anywhere, not picking on Texas here) ignoring evidence that would lead a reasonable person to assume guilt or innocence? Present the facts and let the judge/jury decide.

The problem, I think, is incentivising wins. Winning becomes valuable, and you can reasonably assume that an accused person bears some guilt, so you can spin the story that way. The problem is, the system rewards winning, not being correct.

The overturned conviction should disbar the prosecutor if it can be proven they made a mistake, and/or chose to make a mistake.