I'm almost finished with Diablo IV on Veteran play, and hope to be able to start Nightmare play soon.
Of course, I'm a HUUUUGGGGEEE Diablo fan since the orginal, including playing the D-II:Resurrected for nostalgia, as well as playing the heck out of Diablo:Immortal on Android (well, on PC, technically).
If you like any of the Diablo series, you'll probably like Diablo IV. If you loved Diablo (especially II and / or III) you'll probably love Diablo IV.
For me, though, it is a game I would never have missed. I was a part of the beta test, the open beta and the Server slam. Been playing since day one, nearly every day, until this past week (5-day weekend plus a wedding to go to kinda nixed that daily play lol).
But Elden Ring is a great game in and of itself, also. I, too, got stuck, but I got stuck really early because it's a beast of a game to take on if you've never played anything in the series and aren't used to the machinations of the game. And I hate getting hints lol.