Okay, here we go. So, I'm glad you're trying out new plug-ins and all, and trying new things is a great way to improve, but you need to work on your harmonizing skills. The clashing harmonies give the song an overall very harsh and unpleasant sound. My guess is you used a lot of harmonies like major seconds and minor sevenths (your notes were very close together on the piano roll in FL Studio). If you copy and paste notes from one of your patterns into another pattern of an instrument playing at the same time (and maybe move it by an octave or two), you'll find that the notes are very close together. This creates a very rough texture which should only really be used in some classical/jazz pieces. A general rule of thumb for me is that, when your notes are all in the same octave, they should usually be between 3 and 9 piano roll notes apart, including the black keys. Also keep in mind that a chord like C-D#-G#-B may seem like it follows this rule, but B, when transcribed into the same octave as C, is really just 1 note apart, a big no-no in pop music. Instead, C-D#-G#-C is a much more pleasant chord. The notes of these "chords" don't have to be played by the same instruments, btw, but please try to think more about which notes are playing with each other at the same time. Anyway, back to talking about the particulars of your song: despite the dissonant harmonies, I do like the instruments, and the drums would've really added some meaningful flavor to the piece if they were mixed a little better. Otherwise, I'm sorry that this review is so negative, but if you want to improve, I hope it'll help you! ;)
It's quite appreciated frankly.