Should you bother?
It’s a yes in my view. I used to enter lots of short story competitions when I was first starting out as a writer, and for a good while after too. I got precisely nowhere in most of them of course, but I did win some, including a big one in the UK called the Bridport Prize which is quite well thought of among those who take an interest in such things.
I’d advise anyone to have a go at these competitions if they are currently piling up stories or have a few stashed away in a drawer. They give you something to aim for and provide a tremendous boost if you get a win, place or are shortlisted. Dare I say it, they also get you used to the disappointment of losing – and that’s quite a useful thing to learn when you start looking for a publisher.