hypothetially a massive yes, given that his policies and the party generally are far more popular than him personally.
realistically -
He was elected in 2015 due to an actual grassroots desire for a left candidate, and he had a *long* record on that front. He has managed very good youth numbers as well as volunteers, and i think his personality and policies are both a big part of that. I'm not sure many others could have managed that - in the rest of Europe, the youth vote goes to the Greens, and in US, it goes to a similar figure (Sanders).
According to the thread posted by
@Smores, the problem is traditional labour voters who dont like his links to the IRA/terrorism, and equally don't like the fact that he is a remainer. it suggests that a lot of facebook attacks, real or otherwise, have percolated into people's heads. I personally thought that going for remain would be a disaster and this re-negotiation/2nd ref stance would be the correct way forward. But it seems that Labour leavers see it as a breach of trust that the referendum hasn't been respected. this is objectively a divide that i think no labour leader ould have bridged, and will surely harm the party i the future (seriously, read that thread, its very good).
from his wing of the party, the people i know of are diane abbott and john mcdonnell, who would be at the same position or worse. from the others, i'm guessing equal alienation with leave voters, solid personal ratings*, and no youth surge, so not too much either way.
...
I think what the left has to reckon with is the utter failure of corbyn to resurrect the party in scotland, and the floundering in old labour areas. the left had planned to marry young voters with traditional labour voters and has failed.
*absolutely no doubt that every leader would be attacked viciously, but i'm assuming fewer would hit against others.