I don't want to minimize people's delivery issues. I know I'll be just a critical if/when my car arrives. But, the fact of the matter is I've never brought a "Delivery Checklist" any other time I've picked up a car. Who knows what I would have found. To hold Tesla to a standard I've never held another manufacturer to might be less than fair.
I think it's easy to blow of all these forum reports as being "anecdotal", but there's so damn many of them and when people do report the QC issues with their cars there's some very common themes - all of which which issues w/the Model 3. Just the reports from this thread highlighted the major QC issues:
Poor paint (underspray, chips, nibs, scratches, etc).
Misaligned body parts (fenders, doors, wheel-well garnish, charge port, taillights)
Just plain dirty (anywhere from not even prepped to dirty headliners, to scratched interior plastic)
Sandy Munroe tore down one Model Y and found numerous QA/QC issues present on both the teardown and another Model Y - the frunk garnish on both cars that doesn't snap down right and the rear-wheel-well garnish that doesn't sit flush in front of the wheel. Tesla is purposely shipping thousands of cars with these issues and just hoping that people don't notice or care.
I have two Model 3s from 2018 (late Spring, Fall deliveries) and between them they've had the following issues from mechanical to cosmetic.
1. Rear motor/inverter failure on third day of ownership (left my wife stuck on the side of the road, that was fun)
2. Headlight accent light died
3. Both have poor fender/door alignment at the A-pillar (my car has such a large gap you can see the poor paint coverage under, on my wife's the fender/door are inset from the A-pillar significantly - has that issue where the fender touches the body underneath and eventually starts rusting)
4. Had to adjust the doors on my wife's car to get them to close with normal effort.
5. A-pillar passenger noise on one car.
Despite those issues, it's still the best car I've ever owned and would buy another, but your basic $20-25k Toyota/Honda typically far exceeds the quality of a $50k Tesla.
So yeah - anecdotally the quality/reliability are poor. It's got to be costing Tesla a lot of money to rectify. And combined with poor service in a lot of cases really leaves a poor taste in people's mouths and makes it hard to recommend Tesla to others.