Like all those years he bashed the EU? I kinda feel like people are right not to fully trust him when it comes to Brexit. You take your chances of splitting votes if you vote for another party but for those who are primarily concerned with staying in the EU, I don't think Corbyn makes for a very convincing Remain leader. I also feel like he is unfortunately selling a bit of the same slop that the Leave people are. It's just that he thinks those unachievable promises will come from maybe kind of temporarily staying or being a half member or waiting or something? instead of through leaving.
OTOH, it's kind of frustrating that the left seemingly has to pitch the perfect game. Uniting everyone's disparate interests, getting everyone energized, carefully plotting their strategy, etc. Whatever happens, there will probably be finger pointing from various left factions. It's like whoever wants to lead the left has to get three dozen things exactly right. In the meantime, the leavers can do the exact opposite of what's right on all three dozen things and it doesn't matter.
I am not sure I fully trust Corbyn to navigate the difficult waters of trying to figure out the best answer to an incredibly complex foreign policy issue while at the same time dealing with a domestic audience that is deeply divided, even somewhat in his own party. But I am 100% sure I wouldn't even trust Johnson or Farage to run my no-money office Fantasy Football League. So it's weird to even being talking about it.