We need PR. These super broad church parties don’t fit society. You should be able to vote for the party you want to be in power, rather than against the one you don’t want. The current Tory massive majority was won with around 43% of the vote. That should mean they have 43% of the representatives.
In politics (well under FPTP at least), like in the service you’re often forced to choose the lesser of two weevils.