You're missing some realization. Get a pronunciation trainer to help you. Anyone can overcome their accents - actors do it all the time. The tongue is a muscle that can learn new tricks, but you need a mirror and an expert guiding you. It should take you no time with help if you are an intelligent person.
I'm not a native speaker but I have native-level speaking skills that I acquired through practice. Having an accent while possessing an IQ above 110 is laziness.