Well I'm only a month late so I hope forgivable for resurrecting this old chestnut. Another terse comment but on point.
Except for the Thatcher years, for most of my life parliamentary government has consisted of passing the baton when the going gets tough, with similar overall objectives. Cameron was a big admirer of Tony Blair for example. Starmer is now the opportunist compromise candidate who was supposed to reconcile right and left wings of Labour, and promptly left out the left wing.
There is so much bitchiness in and around left groups it is offensive, not only against Tories but also anyone who rocks a party boat. I think it is partly the fault of behaviourist education, causing a manipulative rather than reasoned approach to issues of power.
I would like to feel welcome to join the Labour party. Two of my good friend did a few years ago, and they both gave up with devious tactics rife even at local levels.
Real socialism is not like that.