You are correct, the poor build quality of the Tesla has made me regret my purchase, 100%, I realised this after only a couple of days, coupled with pathetic customer service/support (almost impossible to speak to someone regarding any issues or concerns).
I've had the car in for the failed charge port door and couldn't even get a courtesy car. I've created a service request for this current condensation issue and I'm waiting longer than I'm personally comfortable with. Actually, having to take the car in to a dealer for repairs twice already on a 4 week old car is not only a bit of an inconvenience, but actually an embarrassment.
Do I want to go back to my Jeep, well I've had a few and the last a 2020 Wrangler Rubicon was not without faults but given what I've experienced these past 4 weeks, I would in a heartbeat.
On your point of the Grand Cherokee, as you happen to mention it, I too owned Grand Cherokee's, both a WJ and a WK2 and in terms of build quality, both, especially the latter were in a completely different league to the Tesla, for one the auto wipers and lights worked correctly 99% of the time, the car felt solid, no rattles, no wind noise etc etc. If you look inside the boot of the Tesla, the fabric lining on the sides, its as thin as paper and I can see exposed single core wires and stuff, it screams, cheap and nasty.