Terrible crime movie fueled by dull teen drama

Rating: 3/10 (22 October 2017)

For context: I have watched over nearly 1000 movies, barely dropping 20 of them halfway through. This movie was one of those rare cases, dropping it after the one hour, when it became unwatchable for me and I considered that nothing else shown afterwards could change this fact. This is my first review, motivated by the huge disparity by the movie's current score (7.8 / 10) and my own opinion on the movie. It's spoiler-free and I haven't read any other reviews.
Baby Driver starts as a high-paced movie with two main plot lines, one covering Baby's job as driver for a crime boss, the other covering Baby's romantic relationship. This movie attempts to please all kinds of audience, intertwining both action, romance and comedy, yet failing miserably at each of these points. The movie attempts to do everything, and does so quite poorly:

Action/crime: Mostly a boring stream of high-paced scenes without any intelligent plans, other than few stunts that barely made me rise an eyebrow. The opening set the mood a heavy action movie which later on would not be delivered. Tense scenes with other gang members, specially the crime boss, failed by becoming predictable, stupid/illogical or just simply out of context. If you want a good action plot, pick among the dozens of brilliant movies. Calling this an action/crime movie is an insult to the genre.

Romance: Again, felt terribly forced to attract younger audiences as confirmed by rating demographics. Minor issues is the weird pacing and uninteresting clichés. Particularly worse was the typical daydreaming teen drama. This movie also heavily emphasizes in the pop and rock music culture of the past decades. It didn't resonate with me, but that's other people might enjoy it more.

Comedy: Voice acting, comedic hyperbole and frequent gags showed the movie was aiming above mere comedy relief. However, puns were uninteresting, lacking originality and at best made me slightly smirk. Movies aiming for comedy should be actually funny, or don't even bother. (As a comedy enthusiast, usually rating most of those 2 points above average I don't think I lack the humor to comprehend the puns here). Sometimes, comedic traits and conflicted with the main action plot, e.g. making things unnaturally dark for a movie that is NOT a dark comedy.

Also, the backstory information came sometimes essentially out of nowhere trying to use teary material to add some weight on top of a shallow main argument. While it does its job at making me understand the characters better and had overall had a positive impact on the movie, it feels as nothing but cliché-material which could have been presented in more convenient ways.
If had included spoilers or even finished the second half (when the movie starts noticeably decaying) I would probably be able to present more issues as well as being more specific about their nature. But this was already a big enough waste of time for me. If anyone feels apathetic about shallow drama fueled by teen angst and music classics of the past years, here's a hint: Don't waste your time with this movie.
PS: Accounting for subjective reasons, I could understand my score of 3/10 could differ by +-2 points from others' opinions. But 7.8 / 10? seriously? With such an uniform demographic distribution? People over 45 averaged 7.5 / 10 for a terrible crime movie mixed with teen drama? Honestly, this looks incredibly sketchy to me, and would heavily encourage IMDb staff to start auditing initial scores.