The only thing on your mind being:
Write a script because you enjoy the process; are interested in the exploration of story, character and form; saying something about the human condition; forming an emotional and entertaining journey; and developing as a writer and person. Not because you want to pimp it out to a competition and get something back.The Reward & Winning
Script competitions are great for a previously completed script that may be ready or just needs a rewrite/polish. They are ideal for an experienced writer who has a body of spec work and is looking for some recognition and a way forward.
They are also good for beginner writers entering once or twice to test the waters, or for fun as a screenwriting hobby.
If you get a kick out of the process and thrill of writing a script for a competition: enjoy the challenge and creating to a deadline. Keep on doing what you're doing. But keep in mind that Your Script Is Not A Lottery Ticket.
The world will always be in a rush and operating at top speed, but that doesn't mean we have to sacrifice learning, experience and preparation (and our sanity) to be in a mad rush with it.
We are only making things more difficult for ourselves in trying to acquire our dreams in the same vein as we would acquire a takeaway. Some things require a lot more effort, patience, time and understanding, and are all the more sweeter for it.
But things don't have to be this way.
It makes sense to spend some good years writing, reading and learning while honing your own writing process, craft and voice; amassing ideas, concepts and projects; and creating a foundation for your writing.
With a little effort and the above you'll be surprised at how you adapt and develop. Each day is an opportunity to move forward: to learn something, and write a bit more.
It's good to keep in mind that a writing ambition is a marathon, not a hundred metre sprint.
Write for passion, enjoyment and craft - not for reward.
Good luck* on whatever path you choose.
May the flow be with you!
*Good Luck: Where Preparation Meets Opportunity