There's a lot of EQ problems, for example I can hear clicking on the sample at around 140 Hz, make sure before you export it out of FL (or AT) you eq the devices separately. Cutting it around 400 Hz - 700 Hz will do.
An EQ is used in every music that's produced on the internet. It's what gets rid of the mud in your mix, and cleans up the sounds from sounding too cluttered. Or you could use it to boost a frequency that's too quiet. The Curve is an EQ, btw. I suggest you start learning it asap.