trying to achieve a something in a dream, but cant

I dont lucid dream, but I had a regular dream last night where I was trying to achieve a goal, but I cant. It was like I was trying to buy a playstation, but it took a long time to get to the store, and I kept trying and trying. By the the time I wake up, I never got the playstation and I was mad, even though it was a dream. I have a lot of these dreams where I try to achieve something, but never achieve it.

Its like trying to walk through a door, but never reaching the door like ur on a treadmill.

Can anyone intepret what type of dream this is, or how I can get more info?