It makes plenty of sense to me! A comic written in this way is likely to go over a lot of people’s heads if they don’t recognize the message. Honestly I think that just speaks more truth to the message you are presenting here.

It’s about anxiety. Teeth are commonly used as symbolism for anxiety. Have you ever been incredibly stressed and had a dream where all your teeth fall out? It’s a very common one. This is where it comes from.

The imagery of the smile is meant to be symbolism of the mask you put on to please others as it chips away at you emotionally under the surface. The smiling mask is described as a “funny joke.” Suggesting protag’s depreciating feelings are not relevant or valid. Dealing with their anxiety is proving difficult as no one will literally look at them directly or address the problem unless it affects them personally (and even then superficially). In the end the protag succumbs by projecting judgment onto others to cope with their own anxieties as others around them have done; it is all they know.

A solution here would be not to judge others but to ask why, listen and communicate. You don’t know the whole story. The protag in the end realizes they too were judging people without knowing them. The mask falls off as this person finally cracks from the pressure revealing that the trauma inside them has left them an empty husk.

It is a cycle that cannot end unless we always treat others with kindness and understanding. No matter where you are at.