Accent is an inevitable part of second language speakers. I've lived in US most of my life, but English is not my native language and I started learning it around the age of 5 and at the age of 25 after living here more than 20 years, I still have a distinct accent I can't get rid of. It's just the way things are, human brain seems to learn pronunciation differently when we're a child.

This same goes for English speakers too. I know how Volkswagen is supposed to be pronounced (I know some German) but that's not the way English speakers would say it.

I don't think there is anything to be bothered by any of this. This just adds to our diversity.