I wrote a sodding essay in reply to a comment on here and the bloody page refreshed. But basically; Labour gained seats when even the polls on the morning of the vote were suggesting the biggest Tory landslide since Thatcher, Corbyn's critics were not just seen off but humiliated, likewise the press who threw the kitchen sink at him and other members of the party, they galvanised a youth movement with 7 weeks notice through embracing alternative media outlets and 'influencers' that took the message to them, that group are also about to watch Labour's direct rival get propped up by people who have views that couldn't be further from theirs. The longer this pact with the DUP goes, the slower the Brexit negotiations go, the more that demographic grows until we end up with a generation who already don't trust the Lib Dems, adding the Tories to the list.
Don't get me wrong, I'm not planning street parties but I've got a party that a) I actually want to vote and campaign for and b) is absolutely going in the right direction. This is why I and many others who were completely written off and ridiculed picked Corbyn, twice.