The one element that makes a comedy like this work, live-action or animated, western or eastern, is chemistry. That's the fatal flaw of this show. While the premise sounds like something out of a reoccurring Looney Tunes / Merry Melodies cartoon series, this show couldn't even grasp the bare fundamentals as to why that sort of comedy would work.
The characters are all bland, generic one-notes with no originality. Watch enough anime, and you will easily recognize their personalities and traits from other series. Because of their unoriginality, it's hard to care about them, let alone have any other reaction to whatever situation they find themselves
in. The attempts at fourth-wall breaking meta humor in the first episode also falls flat: references for the sake of references are trite and lazy.
Compare and contrast the likes of Good Lick Girl, a series with a similar premise but isn't another cookie-cutter, cute-girls-doing-whatever type of comedy. Rather it is a gag series, where the humor comes at the expense of its two central characters, but it is also capable of genuinely heartrending moments.
In other words, the premise of Dropkick has already been done before with far greater success, both in anime and western animation. Like so many other shows before, this show takes a lazy route and doesn't even try to innovate beyond its bare bones premise.
It's a wonder why a second season was greenlit at all.