According to exit polling Ive seen,
reportedly somewhere between 52% and 54% of Independents voted for Biden in 2020. Example:
https://ropercenter.cornell.edu/how-groups-voted-2020 They got what they voted for.
In 2016, Bernie Sanders, the self declared socialist, did much better among independents than Hillary in the primaries. In the general, Independents were evenly spilt between Trump and Hillary.
You can assign whatever reasoning to explain why Independents voters vote the way they do. That you say they voted for Biden because they didn't like Trump... well... Biden promised to reverse many Trump policies, and has. They got what they voted for.