Holy shit man you don't need to do that smoothing effect on every single keyframe. Also, your characters look very stiff and lifeless, you should aim to make your characters more living and smooth when you draw them.
I really do like like your sense of humour and I think there is a lot of potential for your work to be really hilarious, but before that you need to get the technical stuff down. Your characters' faces and heads are very static in every scene, so you should try animating them more. I know this takes up more time, but if you want better quality then you have to do it.
Another import thing you overlook is your lines. They are really wobbly and their sizes are random. Try to draw more defined lines with even thickness'.
One last thing, your voice acting is really choppy. When you edit it together leave a bit of space between audio clips or overlap them. The quality of your voice acting itself should naturally improve if you actively try to sound more animated in your speech.
I hope you push yourself to improve as an animator and don't just leave something if you don't think it looks good.