I've seen people who say this sort of thing in various interviews as well and I'm left wondering if these people understand how their own government works.

The Republicans held the House and the Senate for the first two years of the Trump presidency, so the Democrats couldn't be obstructionist. (And many of the aforementioned interviews were at the time that this was the case.) Since the mid-terms and now the pandemic, it has notably been the Democrats pushing for support for workers and a competent response to the virus, and they're being obstructed by the Republicans and/or the President.

It seems to me that these people are engaging in post hoc rationalisations that mask their real reasons rather than providing information on what actually drove their decisions.