because OK KO is a bad show.
It's a show with a rather great concept however it's completely squandered by its execution.
From a narrative standpoint the show suffers from a multitude of problems. Most notably the hamfisted approach to story telling where morals are unironically and blatantly forced. Many episodes appear to follow a PSA format but lack the sarcasm necessary to construed as a parody. Many characters are one dimensional in their portrayal and character development is often thrown to the wayside to prop up another character because they happen to be the writer's favorite. Cross over episodes seem less as celebratory love letters to shows long gone and instead come off as blatant fanservice at best and disingenuous at worst.
On the technical side of things the show can be described with one word, inconsistent. Overuse of exageration removes the impact of multiple visual gags. Characters designs constantly fluctuate causing causing the animation to be confusing and a visual mess. Timing tends to be wonky and character movement lose a lot of weight and dynamic effect as a result.
There's a reason OK KO gets unmitigated hate, unfortunately it is deserved. rather than build itself up and move passed its faults the show instead double downs and revels in its issues for the sake of "artistic integrity" because In the minds of the show runners a "show that's bad one purpose is ironically a good show" despite the fact it isn't.