I would agree with you - it doesn't look like this will be accepted, but it's important to know why so you can improve and have a map accepted in the future. All maps need 3 things, a unique theme that makes it different from any other map that exists, a good build, and entertaining parkour that has a large variety of different jumps using blocks of different shapes and sizes.
Its important to note that you don't need the best build or best parkour to get your map accepted. Its more about being unique in what you are doing, so you just need to find an obscure theme to base your build off of. Try thinking about some object either in real life or in a video game and make a map about it.