You're literally engaging in Schadenfreude here, specifically in a context where the Schaden is not self-inflicted by the person experiencing it. This means in the country of origin of the word your reaction would be seen as that of an unhealthy mind. So do you think you should be throwing rocks out of your glass house?
> you might have some bigger issues
Of course there's also the bigger question of whether "having bigger issues" invalidates the complaint a person makes, or maybe even the person, as you appear to think happens.
The fact that you take someone's honest admission that they have a problem with something, and decide the correct reaction is to point at them and make fun of them, means at the very least that you're severely lacking in empathy.
