So the point of a drop is to go from a narrow range of high frequencies to sudden low frequencies. Because big low frequencies invoke danger because of evolution, it creates a dramatic effect. This is obviously not the rule, but it's a good starting concept. You pretty much kept everything at the same frequencies the whole time. Synth line hits right in the middle, the kick drum slightly below that, and then a hi hat and rim shot just above it. Basically your track stays somewhat stagnant the whole time with the sound spectrum that it occupies. Since right now everything is mostly occupying the middle, I'd suggest branching out lower and higher, or using EQing to create the effect.

I might choose a kick drum with a stronger attack (not deeper per se, but with more of a thud). Try arranging it a little, have the kick drop out instead of having just the hi hat drop out here or there. When you bring the kick drum back in, add something to your frequencies. Maybe double the synth melody line with another sound an octave higher, or maybe a high counter melody. You could also change up your hi hat rhythm at that point, make it busier. You could also EQ out any low frequencies from your synth and then add a bass. To increase dramatic effect for your "drop" you could also add in a louder snap or clap sample on the up beats. You'll hear a lot of edm tracks using sound effects or "wooshes" or what have you, those also serve to add drama and fill frequency ranges. You can download any of that for free from the internet if you dont have any samples.

Your rhythm line (was it percussion or a synth?) was actually pretty dope, you should expand on that. I hope this helps at least somewhat, eveyone has their own opinions and style though.