I went to a lot of work to adopt a “neutral” American accent, with some success. Perfectly adequate for casual conversations.

Why? You run across many people with accents every day, right? Well, it’s a problem; people definitely treat you differently.

This issue isn’t specific to the USA btw, it’s just I’ve been working in the USA for a long time.

The only accent I treat differently is the unsolicited spam call.

Face to face, I work with Indians, Ukrainians, Vietnamese, Mexicans, Brazilians, Russians, Guatemalans, Cubans, Italians and I love to hear the twang each person has.

Curious what you mean by treated differently or why you needed to put so much effort into hiding your accent? Are you sure it wasn't just general English? Because of course you may get treated differently if you can't speak English...but I think the accent is not really a problem.