well,
whenever i play back a tune on soundcloud, or any other streaming service,
if it's too soft compared to other ones,
i just turn it up.
it is dirt simple, to turn the volume up.
usually, what i find is that the softer sounding songs, cranked up, sound WAY WAY WAY WAY better than the slammed ones.
they usually have good dynamics, better sounding mixes, and don't hurt my ears after a while, like most of the other LOUD MASTERED SONGS do,
with very few exceptions,
even on pro material.
now if you want your stuff to sound LOUD just to compete with the LOUD GROUP,
then you have to learn to master your material.
you can either pay a pro to do it (highly recommended) or do it yourself (i've heard more bad home mastered material than any other issue that exists).