After loading uThunder's song into FL Studio, I can see that the level is basically completely maxed out:

Compared to the audio waveform of my song:

Which brings up two questions:
1. How do you get the audio to be completely maxed out like that? No matter how much I push the limiter, the level never really hits the top that much
2. How do you get it so maxed out and still have it sound fine? Whenever I turn it limiter up too much, it causes a ton of problems, like making the vocals sound pumpy, and destroying the kick transients
I've tried stuff like EQing out the low frequencies on the non bass instruments, I'm not sure if that helps.
I have no idea what I am doing wrong. Do I just need to master it better, or do I have to mix better?
Probably I'm just being bad at everything :(
If anyone can help me with this, I'd really appreciate it.
First post on MLR, sorry if I sound like an amateur X_x..