I'll give a bit of feedback as that's what you want lmfao
Hi-hats sound a bit muddy, maybe choose a different sample or cut some of the mid frequencies (and all the lows of them)
The kick seems a bit lackluster, would probably choose a different kick.
The track seems a little empty, but I'm not sure how much the vocals will fill it out so I can't really comment on that. I would also make the bass guitar mids more stereo (just make sure to keep the lows mono)
Yeah, sub-bass should almost always be mono (usually anything under 100hz) because it sounds messy on headphones. Usually, if you are using a sound that has ow and mid/high frequencies, you should split them into anything under 100hz and anything over 100hz and only put fx on the 100+hz channel too, e.g reverb or detune on sub is a no-no