The art is good and at least the main character has a goal, but in concept this is this is just a slide show, not an animation. (going to need some more frames there buddy)

You already have the main thing down “key poses” just add frames in between them.

Look up pose to pose animation on Youtube.
Also the fundamentals of animation can never lead you astray look that up too.

As for the dialogue it’s really petty and hateful.
Simply put no one feels sorry for a jerk.

In fact every character is generally grumpy and unlikable and just roasts on each other. There’s no variety.

Usually when I make character I come up with both good and bad traits, even for the villains.
In doing this it makes the characters less two dimensional and gives even the bad guys something entertaining about them.

I also didn’t laugh, good dialogue is funny.
Keep on practicing and most of all learning.