The bloom definitely can make certain scenes look stunning and dramatic, but when used everywhere it becomes the eye-gouging nightmare we all. Most devs worth their salt understood this and after a little early awkwardness they learned how to use HDR lighting correctly. Brianna is not a dev worth her salt. She's barely worth her weight in compost. Coupled with her awful, gaudy taste, the bloom nightmare we've seen Rev60 morph into was inevitable.
I also believe that Brianna has no idea what kind of aesthetic she's going for. At a glance it seems like she's going for a 60's pulp sci-fi kind of vibe but that doesn't really mesh with the story or the characters. See No One Lives Forever for a much better example. She probably just thought 60's = colourful = put colour EVERYWHERE!! Maybe then she thought Sci-Fi = lightblooms = put light blooms EVERYWHERE!!
In short, Brianna has no idea how to make something that looks good.