It is incredibly bad at UT and A&M, and as the two largest/most prestigious institutions the discrimination from those schools has the biggest economic and cultural impact. UT is 6% black, the flagship university of a state with a black population 2x that proportion. If I recall correctly this is sadly even better than when I graduated 10 years ago, I believe it was 4% black at the time. Aggy has over 70k students and 2% of them are black, basically a meme of what you'd expect reading texags. For context, SMU and TCU - known across the state for being bubbles for rich white kids - are both 5% black. More than 2x the black student population of aggy and comparable to UT. That's where our flagship public schools are. It's shameful.
Interestingly, UT's 37% white population mirrors the state, it is asian students massively overrepresented at 23%. This is true to a lesser extent at aggy (10%) but to no one's surprise, aggy is much whiter than the state as a whole (57%). Tech is just 6% black and majority white, below the state but probably not as bad relative to the area it primarily serves given most of the state's black population is on or east of the I-35 corridor.
The two major DFW campuses appear to be doing the best in a relative sense. UNT is 14% black, slightly above the state and slightly below the 16% of the DFW metro. UT Arlington is 15% black; UT Arlington gets pretty close to the state at 31/31/15 white/hispanic/black, but has a large asian student population as well. Texas State probably most closely reflects the state but still overrepresents white students at 42%, 41% hispanic, 10% black, 3% asian. UH is 10%, close to the state but well under the 17% of the Houston MSA.
Pretty bleak overall, because the full picture is one where black students are significantly underrepresented at the largest public universities and are sub 5% in aggregate at the top two campuses.