Garmin Fenix 6 Pro GPS Accuracy -- New York City

I've been having a terrible go with the FR245 and Fenix 6 PRO (recently purchased) GPS; Every run is off by .09mi to .15mi. I don't expect my watch to be accurate down to the inch, but that much deviation seems a bit excessive. Anyone in NY here with similar issue? Garmin Support says I live in an Urban Canyon, so the GPS accuracy is expected (but seriously by that much!) HELP PLEASE. GPS SETTING: GPS + GLONASS.