Labour’s share of the vote barely changes but they double their number of seats. FPTP is a wildly undemocratic way to run elections.
(Yes, this is today’s “hill I will die on”.)
I'll see your "FPTP is terrible" and add my flavour of "the /physical layout/ of the house of commons needs to change at the same time to support a fairer government" (my preference would be to move it out of London but I'd settle for rearranging the seating)
FPTP in a parliamentary system has a few graces. In particular, it’s sensitive to small changes in voting patterns like this, meaning you can truly “kick the bums out” when they’re past their best before date.