The current Windows Defender is not the crappy old MS AV it used to be. It's gotten drastically better, and for normal home users I always recommend it over installing any 3rd party AV.

I'm a pentester and red teamer, and yes, bypassing Defender isn't all that hard, but neither are most 3rd party AVs, and Defender does not bring in all the instability and additional attack surface. Also I think it can take advantage of newer kernel APIs that non-MS AV can't.