It's best to have a light hearted attitude about these things (that's why I added a joke). The vast majority of people don't even know their pronunciation might be different from others', ignorance is very human. It isn't malice, though, and even if people did make an effort they would be the odd one out.

One interesting example of a blanket change is the N-word. As expected, it wasn't a grassroots movement but a mass publicized event and collective experience that made it happen.

If people's ignorance makes you angry you're in for a miserable and likely hypocritical life.