Tail end... tail light problems?
I think there were a lot of early production problems such as those you note in the 2012 to 2014 years. Thankfully most of those have been fixed. It's rare to hear about drivetrain "milling", door handles, "frunk crease", A/C noise, etc. from current production cars although these were common problems in the past.
If it's a 2014 and you've only had it for 3 years then you probably bought it used and it may have also been abused. It's unusual to hear of problems with many of the things you've mentioned in cars above SN 70,000.
I recommend that people only look at 2015 or later used Teslas because the quality seems to be much better.