You have to understand Texas received almost as political spending as the rest of the country combined. The result is that Texas flipped in a historically significant manner. Every single state-wide race was won by the Democrats and the Democrats did not win in every county, but they did have positive influence in every single one of the state's 254 counties. None of the polls predicted anything close to this.
Tarrant county was the largest Republican county in the country, and that is gone. Democrats won every campaign in the county except for one US congressional seat.
It is also important to note that Texas Republicans received the same number of votes as they did in 2024, but the total vote was something like 1.5-2 million votes higher than 2024 with all that increase going to the Democrats. Yes, Texas is growing its population super fast, but that vote increase is more than the population increase.
BBC Elon Musk's millions fail to deliver Texas for the Republicans in fierce midterm (52 points, 18 comments) https://news.ycombinator.com/item?id=50369201
Wired Voters Set $400M of Elon Musk's Money on Fire (18 points, 13 comments) https://news.ycombinator.com/item?id=50368522