I think the electorate gets quite the pasting regularly. Blaming the people for their own pain is easy.
Most of what has happened in both countries has had nothing to do with the elections - most of what Labour is doing right now is no where to be seen in their electoral promises. They didn't run on Digital IDs and handing over the digital infrastructure of the NHS, schools, the Met and more to American companies, but here we are.
Much of what Trump and the Republicans are doing wasn't in their promises either - he specifically ran on and bragged about not being a war president. He's a bit notorious for changing as the wind and those paying him blow. The Democrats failed to realise that just running on 'not Trump' wasn't going to be enough a second time.
Personally, I'm more concerned about the quality and integrity of the candidates that we're forced to pick between, that on both sides of the pond politics has developed more into voting to keep a group out than actually supporting the group one's voting for and the political parties know and play into this to the point of losing elections over it, and that a lot of the things that impact us in daily life are people we can't hold accountable through elections (I'm talking 'advisors' and lobbying corporations rather than the House of Lords, which has actually been the challenge to the government we've needed at times).
Sure, we can call a significant portion of the population of either country fools and say they're responsible, but I think that rhetoric is more smokescreen to ignore that our politicians are not and have not been listening to the public in a very long time. Those responsible are those they're listening to, the one's they're giving over large portions of the budget to, having policies written for - like the companies our government is selling our digital autonomy off to, leaving the UK is a far weaker position in actually making its own decisions. No amount of people voting for the "correct" party is going to change how much harder people have to work compared to corporate heads to be barely heard by our politicians.