Maybe you would have; that doesn't mean it'd have been the case for others. The problem here is that while people are saying Corbyn should resign after his supposed failure during the EU referendum...there hasn't really been any, unless you think Sturgeon should resign from the SNP as well. Which would clearly be fecking madness.
There's plenty of reasons for Corbyn to go, but this really isn't one of them, and anyone thinking that Dan Jarvis, Chuka Ummuna, or Tony Blairiband would've reaped better results is probably just looking for a way to get Corbyn out. No Remain party was able to secure all of their voters to go that way, including the Lib Dems and SNP.