Yup, interns.
Imagine someone who wants to be a producer or director but isn't, but managed to at least become an intern. Their job is a desk stacked with about 500 screenplays from people like you (no offense) who each think theirs is "great". A certain number aren't in the industry standard format (and it is VERY exacting). These get tossed in the trash immediately. Another batch are under 100 pages, or over, say, 180 pages. These very likely are tossed in the trash as well since the studio is looking for films that run from 100-120 minutes as it is the perfect length for profit, and in the industry standard format, one page of screenplay averages out to one minute of screen time. Roughly.
Next, the intern will likely barely skim anything that sounds like shit, in other words it has a dumb title. So "Screaming Teenagers In Bikinis" will get instantly tossed by anyone but a Troma-type group. And finally, after all of that, the intern will attempt to read the first 5-10 pages of the remaining scripts. If they don't feel a "wow" sensation from those first 5-10 pages, the script is tossed.
Only those that can pass each of those tests are even read in their entirety. By an intern. But even then, if after awhile, cliches start turning up, or bad dialogue or anything that feels like crap to the intern, the screenplay is still tossed. And anything they actually don't toss they send to a next-in-line guy or gal, who then applies a more critical eye to it, and by critical I mean "could this make us a decent profit"?
All of that said.... go for it! I'm working on one as well and hey, why not? Not EVERYONE who thinks their screenplay is great can be wrong right? I mean, I know *I'M* not wrong, so maybe you aren't either!

Either get an agent and hope to hell they can steer your work into the right hands, or if you want to go it alone, get a whole lot of professionally printed and bound copies off to the studios (there are resources for where to send them, etc.). But... then return to your job that you hate, my friend, because no matter HOW good your screenplay may actually be? Chances are, its greatness won't be noticed, anyway. If you think the interns in Hollywood have a good eye for winning screenplays, go see all ten of the top grossing Hollywood films on any given week. Chances are, you'll agree that 9 of them are horrid.
Go back to work, and when ready, start work on a second one! That's the dream, buddy
