It just makes things more difficult for true geniuses like me.
Nice punchline
The reason I wrote my script was because the story and characters (well, at least one of them) were there in my head before I decided to make a film. That just seemed to be the best medium in which to tell that story - so now I'm trying to learn all the stuff I need to know to get that story across in the best possible way. And it's shitloads of stuff to learn to be honest, but it's fun trying. If it makes some people laugh then it will have served its purpose.
Like Gonzo said, this film is going to end up costing me a few thousand pounds I expect - why would I spend that to tell someone else's story?
And yes, some great directors make great films with other peoples great scripts but in actual fact a lot of the stuff I really really like is written and directed by the same person / persons - eg The Coen Brothers, Terry Gilliam, Tarantino etc - its not like there's no precedent for it working and I think the slightly weirder stuff tends to benefit from it, perhaps because the ideas aren't diluted by committee.
As for the dumpster film itself - it was ok. Looked nice, held my attention, made me smile a couple of times, ending was a little weak, didn't blow my mind. But I could say the same (or a lot lot worse) about thousands of big-budget Hollywood movies.
I agree there is a propensity on the internet for things to just become great big circle jerks with everyone telling each other how great they are with no justification (have you ever been on deviantart?), but slamming stuff harder than it deserves is equally unhelpful.