Did anyone else find him to be really underwhelming and not intimidating?

First of all, you're a retard
Second of all, just because it's "against the norm" and "subversive" doesn't mean that it's fucking good, Ultron sucks because he's not scary, he's not smart in a believable way, he's a glorified jobber, jobs to anyone in the fucking movie, the only notable thing he did was to kill QuickSilver, another jobber that got hit by a stray bullet, what a loser!
> killmonger made sure his goals were over the top and ill conceived, basically hamfisting the villain's arc in to something that wasn't fully explained or thought out
You clearly didn't pay attention to the film, Killmonger had alot of reasons to get pissed off, when he was a kid his father was killed and it's already shown that he was in the projects, already in a shitty conditions and presumably the mother was working late shifts. He finds out that the man that killed his father is a king in a tyrant nation that has technology that could of help other peoples of their race but doesn't due to classism ideology and is out for blood. That's pretty good excuse to get pissed off for and he isn't a jobber, he's not like Ultron, looking up at the lights on the floor