Why won't somebody cut you a check for it. This is where a screenwriting workshop can be valuable. For the real writer, the writer actively working to craft a commercially viable, professionally written screenplay for which complete strangers will be induced to conspire and buy, the motivation is simply to obtain insightful feedback that pinpoints specific problematic scenes, characters, situations or structure that exist in his or her script, then provide possible remedies. It sounds selfish, I know, but at our core we're all narcissistic opportunists deluded by the assumption we have something valuable to say to a nameless public who should jump at the opportunity to part with hard-earned money to hear it. Everybody's always talking about structure because supposedly it's the secret to success.
Structure is a Beginning that leads to a Middle which concludes with an End.
What you need, want and should expect to get out of a workshop is direct feedback on your script. And for this information you should be prepared to give the same feedback to your peers that you yourself hope to receive. When possible, every effort should be made to provide suggestions on how your colleagues can best approach fixing it. A quick fix. You're still going to have to sit down and do the work.