I suppose another factor is that Labour under JC would be a very different, and far further left beast than previous Labour governments.
Corbyn is a lot further to the left, but weirdly I'm not sure his manifesto is. People see nationalisation and then their eyes glaze over. He's actually not promising to reverse most of the Tory cuts to welfare - only tinker with the edges. On the one hand that seems fairly reasonable because Brexit is likely to be such a disaster, but on the other it's not exactly Keynesian, is it?
As for trusting May to sort out Brexit - the claims she made today about the Human Rights elements prove, yet again, that either she doesn't understand the most basic constitutional facts in the country she leads, or she is willing to tell bare-faced and open lies to the country days before a general election.
*The Human Rights Act didn't change anyone's rights in this country - all it did was mean people could rely on it instead of losing a case in this country and having to appeal to the European Court of Human Rights over it - we are bound by the decisions of that court, anyway. That's why the slogan for the Act was, "Bringing Rights Home".
*The European Court of Human Rights has nothing to do with the EU. It's the domain of a completely separate organisation, the Council of Europe - we were founder members, after WW2. We signed up to it, and to the European Convention of Human Rights, after the horrors of Nazism. If we want to leave the Council of Europe then we can, but it won't be quick and we certainly aren't going to avert any terrorist threats that way in the next few years.
It's just bullshit on toast. You might as well argue that we're leaving the EU, so don't need to care what the United Nations think. The two things have no relationship. And don't get me started again on her claims to be the person you can trust to negotiate Brexit - countries leaving the EU don't get to negotiate under the departure mechanisms; the EU discuss it between themselves without the leaving nation being represented in the room, and then get back to us with an offer. That's it. Doesn't she know that? If she doesn't she's incompetent and if she does then she's a liar, willing to say and do anything to retain power. Not sure which is worse.
This is the woman people cite as so competent.
I'm not a Corbyn fan either. I think he's got immense integrity, but I am not sure that's a good thing in a politician at that level because flexibility is essential to achieve much. And while Diane Abbot is apparently ill so I won't say anything more, I am really worried about the shower of fools we seem to have on both sides - Liam Fox, Boris bloody Johnson, David Davis, awful every which way you look. And as John Major pointed out, he'd think the NHS safer with a python than most of them. We used to have people like Heseltine - whatever his views, he was a person worth respecting. Now we have... them.