I don't think they're crap. They are a bit monotonous because your technique isn't very sophisticated, but listening to your most recent tracks vs. your earliest ones, I'd say you're making a lot of progress in terms of both composition and technique. I'd encourage you to explore using more complex instrument voices and effects and more dynamic variation. Also, many of the songs meander quite a bit melodically, and lack much differentiation in sound and feel between different sections, and I think they might benefit from some attention to these areas.
But really, you seem to be doing fine at figuring this out on your own, so just keep at it.