No doubt, fangraphs is not friendly to Devers' D. The DRS is not nice to both Devers and Bogey.
B-R has Bogey at +0.1 dWAR since 2016 and +0.4 since 2018, so they see him as improving, despite his best season being 2015 (+0.7).
B-R seems a little kinder to Devers than fangraphs, but they still have him negative, as he should be:
-2.2 dWAR since 2017
-1.2 since 2019, including a 0.0 year in '19.
He appears to be getting worse since 2019.