Goods in the UK &EULA
The EULA is irrelevant since it is not incorporated into the sales contract before purchase, and even if it were it could not exclude rights under the Sale of Goods Act.
An EULA cannot form a second contract on installation of the software or commissioning of any sort (as the maufacturers claim it does) because their consideration is past, i.e. you have already paid to use it, so clicking 'I accept' is a "bare promise".
We don’t have to give a toss about the reams of garbage lawyers cook up to confuse everybody. Someone in Parliament had a moment of sanity a few years back.
I can, with confidence put the shittiest screen and battery pack replacement in my phone, watch it melt when plugged in to my third party charger that emits sparks every few seconds and feel smug that I was a totally tight moron when selecting parts based on price rather than quality:)