TNsubaru

Out of the blue my 2015 Legacy NAV is now 50 to 100 feet off. Fought like a rabid dog with Subaru and they agreed to install a new head unit and antenna. With the work done it's still off by the same amount. They told me that "spec" is withing 300 feet...seems like it's time to dump Subaru and buy a real car. Missing every highway exit by 300 feet does not seem like something I should pay for. Thank GOD it's a lease and not something I own. Counting the days til 12/9 when I can hand back the keys to this hunk of crap car. Anybody else have the same issues?