No offence but it's confusing seeing you talk about revising character designs and having the idea for years with this being the end result.
Animation designed to be simplistic can work with context or if the writing, pacing and comedy is good, but it doesn't work here because there's nothing else going on. Dialogue is boring, jokes aren't funny, voice acting is bland etc.
Character designs are probably my least favourite part. Probably the most uninspired designs I've seen for a while, even if the animation style wasn't as simple as it is.
You've been doing this for a long time so I feel like you could do a lot better and considering this was released in February I hope you actually make something that's interesting and looks good.