Sometimes it's cathartic to let off steam instead of bottling it up. Once you have said it, it's up to the receiver what they do. If they truly care and are not obsessed with how they feel, they will get in touch and make amends. That would be if they care enough, and value your friendship. If they ignore or go on defensive as many people do, then let them go, wish them well and give your energy to others who appreciate it. Everything atrophies eventually, including poor friendships.
Another Tory MP crosses the floor
NHS U turn on trans terminology