The country moved to the far-right, the Industry I was working in - Finance - lost 40,000 jobs, Britain got general Economic stagnation worse than the EU, the value of the British Pound fell significantly against the Euro after the vote (fortunatelly I moved all my savings out of Pound-denominated assets evern before the Leave vote, so I personally was alright) all of the sudden as an EU immigrant you became a second class citizen with lots of extra hassle for living there (inside the EU, EU immigrants have the same rights as the locals, so when Britain left, they lost that), significant decay and problems with their National Health Service, really bad mishandling of COVID (especially in the beginning) and so on.

In some ways the place turned into a mini Trump's-America, only with the extra nastiness of already being very classist country with very low social mobility from the start and a heavy "know your place" mindset - which is extra hard for immigrants because Britons see themselves as superior to all foreigners but Americans, so "Immigrant" is the lowest "social class" for them - and without the upsides that American has (mainly space and scale, natural resources and at least in some places good weather).

Mind you, most of those things are trends predating Brexit which were heavilly accelerated by it.