It's a depressing feeling but the key point is that it's not motivating you any longer and motivation was the driving force of the project. When I face situatio

It's a depressing feeling but the key point is that it's not motivating you any longer and motivation was the driving force of the project. When I face situations like that I usually raise the requirement bar up until it feels hard and fun again. So I suggest that instead of just doing what needs to be done with your project, invent a novel solution to the problem that is useful enough but most importantly - motivating you to do it