The main problem is, because of various political idiocies, the US has put effectively no money in basic infrastructure in 50 years - so the lines are old and a lot of the more local base load generation has aged or is aging out of functionality. In addition to this, the power industry was one of the ones that got privatized in the 80's and regulation of it has been remarkably milquetoast outside of a few pushes like after the 2003 blackout.

The Texas problem has to do with ERCOT dodging oversight by keeping its grid separate from the other interconnects and within state lines, so they don't need to actually bother with much national regulation, like investing in heaters on their gas lines to keep the valves from freezing, for instance.