I really don't get this notion that he's "nuanced" ... he's as nuanced as your average school shooter, which is what I get the impression his character is based on. I've never seen Driver in any other role, so I don't know what kind of actor he is, but his performance didn't really do much for me, and he just looked completely wrong in the role for mine in this and so as a villain I just found him so boring and annoying and apparently so did plenty of other people.
I think the problem partly lies in him being such a young privileged white kid with a princess mother and hero dad... just kinda makes him more of a dick with an inferiority complex than anything genuinely menacing. He's too young to have really been through much, and his major gripe is his dad was a "disappointment" FFS. Then, to cap off his sandy-vag attempt at villainy he gets his arse handed to him by some chick who has no training in the force TWICE and carries on like a total little bitch both times, so for me I find the notion anyone finds him either interesting, "nuanced" or intimidating kinda weird. He's a cliched troubled upper-middle class teen that doesn't know how good they have it; utterly predictable, shallow and moronic in the extreme.
It's funny, but I also am often very critical of the MCU for having very dull and uninteresting villains too, but I've been watching Daredevil the TV series lately, and I've got to say that if you want an example of a genuinely interesting and layered villain, Fisk is a genuinely worthy example. In him you have someone who comes with a genuine struggle in him and who makes you even feel a little ambivalent about the notion he could get taken down. Unlike Ren, he also comes from a place that makes his ruthlessness and drive almost reasonable.