It looks into the numbers for the Texas renewable buildout, and there's a very important caveat: the amount of renewables you build is not the relevant metric. Emission reduction is. And Texas does not succeed there.
If we're talking about the impact of a particular tech, choosing the proper baseline is important, otherwise it's easy to reach fallacious results in counterfactual reasoning.
Emission reduction versus what? Per-capita emissions reductions? Per-kWh emissions reductions? Compared to whose usage?
Plotting total emission and saying "we've failed!" actually hides a lot of what's going on, it's only one aspect, and increased population can hide that overall emissions are trending in the right way.