Few years back (before covid) I splashed out on a fancy Dyson. Worst vacuum cleaner ever. I'm sporting a Vax now, quite good, even runs VMS.
If you pick up a Dyson vacuum you'll notice that it just feels flimsy in the hand. I think they're aggressively cost-engineered- the material you save by designing molded parts to be minimally thick has got to be like tens of cents to a couple dollars over the whole machine...
In the UK at least his actions (offshoring, Brexit and tax) have probably significantly devalued the brand with a key part of his core demographic.