It can certainly hurt if you worked hard to make something and no one appreciates it (or worse, are actively hostile toward it). If it happens enough, I'm sure

It can certainly hurt if you worked hard to make something and no one appreciates it (or worse, are actively hostile toward it). If it happens enough, I'm sure one can develop some kind of mental illness. Especially if he already had issues with self-esteem. Btw, it is perfectly possible to be honest, without being cruel or a jerk.