to gesso or not to gesso

at the risk of sounding like a spoiled brat, l hate it when l do a terrible painting! I spent a good part of Saturday afternoon sweating buckets and smelling like  a taxi driver, busting my backside trying to get a painting finished in time for an art show in which the entries need to be in by yesterday. I would have finished in time if not for the fact it was the worst painting l've ever done!After a couple of hours both myself and my canvas looked like Edvard Munch's 'The Scream'...me moreso than the painting! Now, l know l've done some shockers before, l'm not egomaniacal enough to think that l've never done a terrible art work before,but l have never gessoed over a canvas this big before to paint something else. The quandry l have is to paint it over with gesso and start again, or try to finish the painting to see if l can turn it into something half decent? The background is working, the couch looks fabulous, but the figure on it just isn't working  and l just don't know if l have the chops to finish and see what l end up with.....................maybe l'll do it anyway and if it's really bad l'll gesso over it....OR l could give it away as a present ( to someone l don't like maybe ? but then, they wouldn't actually get pressies from me.......)