It has a lot in common with other capitalist democracies, in that the capitalist element invariably subverts the democracy element. Money is a synonym for (and often a quantification of) power, and those with money are able to manipulate the electorate, often through their friends in the media.

One element that makes the UK worse than many similar nations is that we never had a French-style revolution, we still have a monarch, lords and ladies, barons, "knights", etc. The Conservative part is the party of old money, the old boys club who have trodden the same path from Eton school to a PPE degree at Oxbridge and then into politics. Then throw in a few women and non-white faces as a superficial concession to modernity. Boris Johnson is the embodiment of a tradition going back centuries, the talentless, arrogant, entitled rich boy to whom the rules that everyone else has to live by simply don't apply.