Comment by hkt
The UK hasn't elected a government on 50% or more of the vote since the 1950s:
https://www.statista.com/statistics/717004/general-elections...
It is hard to call minority rule democratic, really. I've no issue with your point on the OSA and think it is widely supported, but let's be realistic, representation in the UK is virtual on matters like this: widely supported, but mostly by coincidence.
2-party electoral systems (likely to bear >50% majority governments) are also not very democratic, in a way. There's no perfect system, but I prefer minority governments to a 2-party duopoly. YMMV.