Aye, that's why it's important Corbyn wins too: that the Left also has the anti-establishment option. The media (and many lads on these boards) are doing their best to paint him as being rubbish...much like we were reading about Brexit/Trump. But many normal folk are with him...again, just like Brexit/Trump.
I'm still UK citizen, so my vote will go Corbyn. Long old way to go before the General Election, tho'.
As a strong supporter of Brexit and weak advocate for Trump (he is an utter arsehole, but I love his anti-PC ness), I think you are wrong. Looking at it rationally, some of Corbyn's policies and positions include:
Socialist - an ideology that hasn't been voted in since 1970s and is failing worldwide
Supposed IRA sympathy, and Hamas + Hezbollah "friends"
Falklands discussion with Argentina (he visits the Argentine embassy and gives talks about this)
Stop The War chairman
Abolition of grammar schools
Pro-immigration
Pro-EU
Part of a liberal group of Islington metropolitan politicians out of touch with many of the disenfranchised working classes in the industrial North
Anti-Trident and refuses to press nuclear button
Shadow cabinet and party of jokes (Abbot, Thornberry, Livingstone, Vaz, etc)
Doesn't sing national anthem or wear red poppy without being forced to
Has a communist shadow chancellor who quotes Mao
No "shoot-to-kill" policy for terrorists
Anti-monarchy
Disliked by most of his party
Anti-bombing ISIS
Hypocritical - rebelled against the party whip more times than any other MP, then sacks those who go against him/calls for PLP unity
These views don't really remotely resonate with Middle England swing constituencies. Even if they agree with one or two of his ideas above, they won't vote for him because of the other ones. In contrast, Brexit and Trump promoted anti-immigration, nationalist policies, essentially the opposite of Corbyn. Labour need a 10% swing in GE2020 for a majority of one. That's before pro-Tory 2018 boundary changes which give them another 15 seat cushion. Meanwhile, polls (which have recently underestimated support for the right) have Tories in a record 10-16 point lead for a sitting government at this stage of the electoral cycle. In contrast, Miliband had a 5+ point lead at this stage.
Whilst I can see the parallels between Trump and Corbyn in terms of being outsiders/anti-establishment, the two aren't really similar. What drew people towards Trump will draw probably them away from Corbyn. You may disagree, and I will admit if I'm wrong, but I just can't see it.