it isn't undemocratic, the purpose of the system is to produce governments that are able to govern

look at the last few governments, now imagine that we had a system that meant it was impossible to form a government if the government wasn't popular. there is no natural majority for any position that a political party in the UK can realistically take.

you don't end up with greater democracy, you end up handing unlimited power to unelected people working in government who end up being the only source of administrative stability

one of the main problems is that people in the UK who are in politics often disagree with voters at a fundamental level. changing the electoral system will not fix this. you will have elections, they will say they will fix problems they don't want to fix to win the election, and then their popularity will plummet shortly after as the insiders take over and do weird stuff that no-one voted for or wants. when you have governments that are repeatedly unable to perform very basic state functions, the problem is not the electoral system (or voters, one of the unusual aspects of politics in the UK is the blame and contempt that politicians have for voters, it is easy to see on this thread...perhaps you realise why they want proportional representation now).

As a Brit, I certainly think it’s a problem, because as you say, you can end up with a government with a large majority of seats based on a small proportion of electoral support.

I much prefer the ranked choice system here in Australia. I’m sure there are flaws, but you tend to end up with candidates who are more representative of the wishes of the electorate, and you eliminate that “I’d better vote for A in case B gets in” vote-splitting thing.