Kinda my point really
Northern Ireland is suffering through increased cost of shipping and trade. Many companies are reconsidering what they will and wont ship to northern Ireland, one example here. So yes uk population is suffering.
All this was done at the insistence of the EU. As you suggest (whether I agree with it or not) Britain didn't even seem to remember that NI was thing until the EU brought it up.
They did it to protect the Good Friday agreement. And because ROI was a very important member state and they care about their member states. Supposedly.
Yet now they are quite have with there being a border between NI and Ireland. All because they fucked up their Vaccines program, and their contract writing.
If you are going to trade on sincerity and care of member states, you need be sincere and care about member states even when it isnt in your interest. You cant call a soveriegn nation state a bad guy for something you then do yourself
This contradiction,coupled with its behaviour in the last 24 hours really strikes to the heart of the trustworthiness of the EU. Especially the idea that the EU is the peacemaker of Europe