In 2010, we were 2+ years into an economic recovery. Today, inflation is at it's highest level in decades with no end in sight- that's the kind of thing everyone, even those who normally pay no attention to politics, take notice of, and they are going to want to blame someone. The Dems control the White House, the US House, and effectively control the Senate. They are in complete charge, and things aren't going well, so they are likely to pay a heavy price when things are going poorly in the economy. When even folks who have jobs and have always been responsible find themselves unable to feed and cloth their kids, or have to take an additional job in order to do so, they can get a bit cranky. And a cranky electorate doesn't bode well for the party in charge.
Also, I have a hunch (and it's just that, so I may be wrong) based on what I hear on a day to day basis that a lot of those same folks who are normally don't give a damn about politics, especially people those with kids, are more than a bit disconcerted by some of the extreme social policies being pushed by the far left elements of the Dem Party- whether it be "defund the police" or the seemingly excessive (obsessive?) focus on things like transgender politics. As I alluded to before, Dems in Texas aren't the same as Dems in Massachusetts- they tend to be a lot more religious/socially conservative and may not take kindly to some of the stuff that northeastern liberals love so much.