Don't be hard on MMC, they are a minnow amongst pikes and yet they are trying to improve and yes, they survive.
I have a 2021 Tesla M3 and that company has serious customer service issues.
At the moment there are NO RHD windscreens in the UK, and no firm delivery date.
Body panels are slow to arrive, it has been estimated that the average "time off road" for a relatively minor accident repair, requiring both body panels and suspension parts is 16 weeks.
The availability of accessories is poor and customer service response to questions about delivery problems is virtually absent.
My car as regular electronic issues: at the moment the boot opener is, shall we say, unpredictable and despite 2 past visits to the service centre, it has not improved. I shall be back, because I'm fed up with the boot hitting me on the head...
On the road it is brilliant, but for a global enterprise offering "the future"support is no better than little old MMC offers through its dealers.