Honestly, the behaviour of the entire political class over the last few months or years has made the UK seem a bit like a guy who's had a serious nervous breakdown at work; his employers might well keep him on but everybody knows that his career's basically finished and that he'll no longer be trusted with any important stuff.
Whatever belief people had in our democratic system is long shot down. Both sides of the debate have reason to doubt that anyone represents their views any more.
1) Referendum - lies and deceit from all parties which should have negated the result.
2) PM No 1 makes a run for it after realising the extent of the screw up he made
3) Article 50 triggering - triggering article 50 before starting any negotiations (in clear contravention of the Leave campaigns written documentation)
4) UK negotiation teams half assed approach - virtually no plan going in apart from "This will be the easiest deal ever"
5) Failure to get a deal that a) achieved separation from EU and b) maintained the GFA - impossible dream as the two are pretty much mutually exclusive due to border issues
6) Multiple failures by PM2 to get deal 1 passed in Commons
7) PM 2 ran away
8) PM 3 voted in and proceeds to lose every vote in the Commons to date
9) PM 3 prorogues parliament in an unconstitutional manner and loses case in the Supreme court
10) PM 3 proposes deal 2 which stands less chance than deal 1
11) PM 3 proposes having cake and eating it as he can both comply with Benn act (as stated in Court proceedings) and perform no deal (which is expressly forbidden by Benn act)
You would honestly think that even tin pot dictatorships get things better than the shambles above.
Tin Pot dictators generally are experts at manipulating this bigotry. Idi Amin was in the news this week, some anniversary IIRC. Whatever. Many of us will remember the Ugandan Asians coming here to escape his brutal regime. The country did not do well without it's shopkeepers and business owners but it was undoubtedly more black and less brown. Zimbabwe too - the white farmers were booted out turning the bread basket of Africa into a basket case. Farage, Johnson and the Make-Britain-White-Again people are playing the same trick. Our economy will do badly but there will be less Poles and other assorted East Europeans. For many Brexit supporters that is reward enough, just as it was for the Ugandan and Zimbabwean voters.
Despite your comprehensive list of failures it is interesting to note that most polls suggest that a general election would leave the country much as it already is.