Beto was never going to win this. These deep southern states with extreme racial polarization are almost impossible to move. Beto getting 46% would be a great achievement for the party. TN is definitely more likely to flip, though the state is technically much redder, because it has more whites with at least a potential to vote Dem, while they are stuck at around 27-29% in TX. All these racially polarized southern states are like this, which is why Roy Moore only lost by 2% in AL.
While clearly "Beto was never going to win this," TX is not in the same category as MS/AL.
Actually TX is a bigger version of AL/MS
Do you live in Longview or Beaumont or something? If so, I could see why you feel that way, but it is a stunningly ignorant statement otherwise.