Hello Aspire,well done for a sober month.Sorry to hear of your troubles,please don't let ignorant,rude people drive you down so much.Remember these people are work colleagues and you don't have to put up with their crap.Sometimes tackling people head on works,they are a bit taken aback and even if you row,they are more careful what they say in future and show you a bit more respect.
I know it's awkward to pull someone up,especially if its not in your nature but it does get results.There will always be people who see others as weak and try to dictate to them and put them down,best wishes.