Dark Souls 3 isn't the best but it's still solid when you get into it and not that hard. I just prefer Sekiro and Bloodborne but I still think From games offer some of the better lore in gaming if someone's willing to look for details and read item descriptions. Then there's pretty good gameplay, atmosphere and a bit more challenge than most mainstream games offer. I'd say it's worth sticking with.
I just made the mistake of trying it after Bloodborne and Sekiro, both of which are faster and more exciting. But well, Bloodborne is one of the best games I've ever played in many regards and Sekiro is up there as well. Dark Souls doesn't click with me as much but it's still good. I am somewhat disappointed Elden Ring seems to have taken the most cues from Souls, though.