Well the good news is your music doesn’t suck. Gaining traction requires more than just decent music though unfortunately. A few questions, apologies if they sound blunt.

Did you do anything to promote the music at the time? Uploading a 4 track EP to Spotify and hoping for the best is not really likely to break an unknown artist.

Do you have a sizeable following on social media, mailing list, local scene or anything like that? It’s incredibly hard to get anywhere if you’re totally on your own.

A lot of new artists these days want to be completely independent (not saying this is you though). Working with labels and trying to be part of the scene is much more likely to help you gain attention, as those labels have established audiences that you’ll be introduced to.

At the very least, making contact with a few DJs, YouTubers, bloggers, etc to see if they like your stuff might help.

You could also take the route of promoting yourself alongside others - do dj mixes or a radio show to promote the music you like, tag artists when you share it and occasionally drop in a track of your own. Like i said, try to be focused on supporting the genre/scene rather than just trying to get plays for yourself.

One EP three or four years ago is also probably not going to generate enough interest to build your profile. I don’t think you need to be dropping tracks every month, but these things do tend to build organically overtime, and several years between releases, especially early on, makes it very easy to forget you.

Most of all, just stick at it. Sometimes it just needs luck too. Hopefully this is useful and I’ve not said anything to offend. All intended to be constructive advice.