I'm not sure anyone has ever pointed this out to you (sorry if they haven't) but it's pretty difficult for a web design business to scale profit growth like a software business.

Web design is service based, so your profits and costs increase linearly.

OTOH, a single piece of software can be sold multiple times, so the profits don't have the same relationship to costs.

I don't think that makes your business mediocre - just a different kind of business.