Actually not winterizing coal and natural gas plants when warned in 2011 this could happen and choosing not to because it is expensive combined with Texas being on its own state power grid to avoid regulations that would force them to pay for winteriziation is what is killing people.
https://newrepublic.com/article/161386/conservatives-wind-turbines-killing-people-texas-blackouts
I saw these headlines with articles that ranged from 1 to 2 paragraphs while not actually providing any useful information