Why does everyone in Missoula tip so poorly?

My girlfriend and I have been working in the restaurant industry for a little over 5 years now and never have seen worse tipping culture than here in Missoula. We have gotten multiple $0 tips since we started serving here (first time in Missoula) which is mind blowing. And before you say maybe we deserved it, again, we have been serving for years now and we know how to provide good service. If you can’t afford to tip your server when you eat out, YOU ARE TOO POOR TO EAT OUT.