Every car I've ever had has developed a fault of some description, from the lowliest Lada (rust, mostly) to the mighty (and damn expensive) Audi S8 (fuel pump failure, at speed, on a motorway ?). The dependable Golf (a radiator that required taking the front of the car apart to replace, and a gearbox that decided to lunch itself), and the quirky Frontera Sport that sprayed more petrol onto the road than into the cylinders. That's only a small selection, and without mentioning the motorbikes, with the sort of electrical gremlins that give sparkies nightmares.
And I'm not talking a lifetime of old wrecks. There's a range of ages and conditions in just my history. Then add my parents... they had new cars every few years back when they could afford them...and every single one of them had an issue of some sort.
Of course it's frustrating when it seems like the dealer has their fingers in their ears. Yes, some of the stealerships are as much use as a man short, but not all. You could say exactly the same of any other dealer network or local garage. The dealership experience could well be the make or break for MG in the UK, but for every horror story like yours, how many 10s or 100s of people have had perfectly satisfactory service from vehicle and dealer.
I don't get the pointing out of flaws that aren't ?

. No 1 pedal driving. No sport suspension. Those were never on the spec sheet ?

That other manufacturers have them for a premium is freely acknowledged, doesn't make it a flaw. If you want those items, you have to go elsewhere, and MG make that perfectly clear.
Of course, you can always look at the competition... could spend 5 times the price, and have trim that falls off, and a self drive system that sometimes goes all Christine. Or you can go cheap at only double the price, where the electrics will try to make you the main meal at the barbie.? Are those features worth paying extra for? Or do we accept that sometimes rogues slip through, and the dealer/manufacturer is frequently below what you'd hope for