Independently I have come to the same conclusion in the last 24 hours, and today started the rejection process on my MG4 SE SR. Like you I like the car but am not willing to accept the lack of support from MG UK, SAIC and (most surprisingly) the dealer that I purchased from who deserve the gif from Kithmo the most.
We clearly have different major issues - the straw for me is the inability to AC charge reliably which is kind of basic functionality for a BEV.
SAIC need to learn the lessons from the launch of the MG4. Such fundemently new platforms will always have issues, and I expected there to be more than there are, but the reaction to them is key to keeping customers onboard. The response that I have received is textbook how not to do it - fail to acknowledge issues raised, then deny that they exist anywhere else, then fail to offer a solution or timescale for one.
I'm currently conflicted as to where next. I'm torn between the route being trodden by
@beefyj in looking to return to another example when the initial issues are resolved or whether to revert to ICE after 5 years of EVs. The former makes sense if you believe that SAIC are learning, but I'm beginning to feel that they have failed to learn from multiple issues with the ZS and that the remainder of the industry are going the wrong way with ever bigger and more expensive offerings - Hyundai moving from the original Ioniq to the Ioniq5 and 6.