Part of the difficulty in giving this critique is that I can't really see how you made this. There's a little bit of phasing going on with the sub against the blips. That probably means that the samples you used weren't quite the tempo they said they were.
Thanks for the advice. You're correct that it is a sample. I'm not confident on my own sound design in that area just yet but I'll put my own pad synths in my next track and leave it open for you to check out if you don't mind. I'll fix all the technical issues you mentioned as well. :)
Also just in general, there's a little bit too much going on in the subbass and it's drowning out everything else. Maybe don't use so many kicks in such rapid succession, or maybe try scooping out a little bit of the subbass with a PEQ.
That can actually be rhythmically interesting if it's intentional and done effectively, but I have to be convinced that it was intentional. This doesn't sound like you meant to do that. The ending is very abrupt. It sounds like you're using a sample there and you just sorta reached the end, so maybe look at designing your own sounds to get some more control