I haven't played 3 myself but as I understand it, it takes some cues from Dark Souls so I guess it depends how you feel about that series.

I loved darksiders 2 on the wiiU, got darksiders 1 on ps4, didnt like it, far too linear. Got darksiders 3 on PC, great graphics, a huge improvement, unfortunately I didnt enjoy the game, didnt even finish it.

With that said I got darksiders 2 for the switch and looking forward to replay it, that one was a masterpiece.

Darksiders 1 is my personal fave in the series.
Darksiders 2 has the best character in Death voiced by Michael Wilcot. Also best music from Jesper Kyd
Genesis a fun spinoff.
DSIII in all honesty. Different studio with some of the same talent but Joe did not work on this at all. This game felt more budget and it was. If these were films. Genesis would be the TV mini-series. 1 and 2 would be theatrical releases. Darksiders III would be the one no one wanted to pick up except Netflix and be basically the Cloverfield Paradox of the series.
I still hope for a DSIV but only if it lives on the promise of the ending of DS1 I have waited for since 2010. The 3 others come to save War cliffhanger.