I don't believe the words 'good' or 'bad' are useful to describe people. We can, and should, aim to be more specific.

As Cowbee pointed out already, 'centrism' is a vague concept, especially since this site isn't just people from the USA. Does it mean people who are apathetic about left-right politics? People who intentionally position themselves in the middle? People resistant to changing this terrible tragedy?

Even in my country, and my country is progressive compared to the USA, both the center-right and center-left parties (I'm using Wikipedia's evaluation here because I object to the left-right political scale) are funneling wealth up to the rich, destroying our environment, compounding housing issues, supporting an ongoing genocide and scapegoating immigrants. Seeing either of these parties as acceptable is a serious issue, and is complicity in the crises these issues create.

That doesn't mean I absolutely judge these people as 'bad', perhaps ignorant or misled but not bad, there are many sincere and caring ways through life that lead people to these harmful positions, but it's a seriously harmful political position which we, as a society, are obligated to shift. And yes, apathy is a political position too, there is no 'apolitical': the status quo is just the ideology of the ruling class.