Your being punished for being in an accident while following safety protocols while working for a city smells like you should have some kind of formal avenue for recourse; do you belong to a union? Can you file a complaint? Seeking justice through official channels might be a stressful headache, but your complaint has to be taken seriously, and doing anything in your defense might make you feel better. As for your frustration from your treatment in your studies, academia has a reputation for all that garbage, but is there a dean or advisor to whom you can complain, or just vent? It all sounds egregiously unfair.