I feel the same way about Prometheus, lots of interesting ideas and memorable sequences that are beautifully shot but aren't connected together in a coherent way leaving the motivations of characters unintelligible by the end.

I watched Romulus recently and its kind of just a fan service film with a few utterly ridiculous sequences. The only things that really offended me where the heavy nerfing of facehuggers and the controversial CGI character who looked bad. Mostly it was just kind of forgettable but started out pretty good.