The problem is, and it's a catch 22 this, people 'think' Labour will win by a landslide. A lot of people who didn't vote in Brexit, didn't vote because they thought remain would win by a landslide, Boris had made leave into a laughing stock... Remember, Tory voters will not be admitting to the polls that they'll be voting Tory, just like with Brexit, so their actual vote share will be much much higher than the polls suggest.
So with every voter that doesn't want a conservative government, but votes anywhere other than Labour, Conservative have more of a shot of staying in power, because the anti tory vote gets split. There just isn't enough support for any of the 'other' parties to mount a serious challenge for government.
However, if we only ever vote one of two ways in these elections, then how the hell is anything ever going to change? It's not.
That's the catch 22 tough decision that most of us are faced with. It sucks, it really does... But I'm mostly worried that, with all of these decent looking alternatives, green, reform etc that the anti tory vote is going to be split, and that they may cling onto power by the skin of their teeth... That's why I'm voting Labour.
On the other hand, these alternative options give traditional tory voters a way of expressing their disappointment with the current Tory party, without having to consider the one party they'd never vote for, so maybe the Tory vote gets split too... We can only hope.
(P.s for the record I would never vote reform personally, not a chance in hell. They want to leave the European Convention on Human Rights, and still continue with the Rwanda plan.)