I do get your point, but we are at a stage where if you don't go for Labour/Starmer, you WILL end up with Johnson instead. Which would you prefer?
I don't like the idea of voting for someone because hey aren't someone else, but we're now so desperately in the shit it's something we as a nation really have to consider.
Votes for left wing parties tend to outnumber those for right wing, yet we always seem to get a right wing govenment. There's numerous reasons for that but one big one is that the right wing vote is less fragmented than the left. The vast majority of that persuasion will vote Tory, whereas left has a lot for Labour but in the past has seen decent proportions go to Lib Dem, SNP in Scotland and no the green vote is looking like it could increase significantly. We might look for this perfect fit, but all that seems to result in successive Tory governments.