Unfortunately, not just voter apathy but voter suppression. Texas is a lot closer to blue than they want to admit, but have done an excellent job with disenfranchisement.
Consider 2022 in the Rio Grande Valley. Jessica Cisneros was a progressive primarying the incumbent Henry Cuellar. The party called in help from the national party to make sure the progressive lost to the anti-choice NRA stooge Cuellar. Cuellar won by 289 votes. In the neighboring district, Michelle Vallejo, a progressive, actually won her primary and was up against the MAGA chud Monica de la Cruz. The party pulled Vallejo's ad funding during the final month of the campaign.
This was during the 2022 election when the party was doing ad buys for MAGA candidates.