This is rather disingenuous. The Model 3 was one of the most popular new cars sold in the UK last year, Tesla isn’t losing money on those sales. You can’t do a market analysis that ignores the main competitor.
If I had to hazard a guess, the real reason James Dyson pulled the plug is a) EV development and tooling for manufacturer is hugely expensive, and b) Dyson is private, and James Dyson doesn’t want to accept investment or inject his own capital into the effort.