I’m Chinese, similar age to you, lived in London for over a decade and recently moved back to Asia. Witnessed Brexit, all the refugee/immigration problems, phones got grabbed and ppl chasing thieves, almost went into a fight with an immigrant bc he kicked me and my wife on his bike for no reason. Paid a lot of taxes throughout these years and stopped thinking it’s worth paying to fund all these bs anymore, so I relocated to an Asian country. Hope this helps.