I feel the biggest things holding this piece back are
1. The scene is very well-lit, so the neon doesn't have the chance to stand out as glowing/bright. Darkening the pavement, dumpster, and interiors would help with this.
2. The neon lights don't colour the environment around them. You have some immediate reflections here and there, which is good but barely noticeable in the image overall.
Really, both of these are manifestations of the same problem: you're overpowering the neon lights with a neutral-coloured light source, so they don't get the chance to look bright or interesting. Try colouring the scene as if the neon lights are the only (or at least main) light sources.
I recommend looking up photos of neon-heavy cities such as Tokyo, Seoul, and Hong Kong for inspiration, you'll see that the neon colours affect everything in the scene.
This post has some great examples to get you started.
You probably don't even need the glow effects, because the lights colouring the environment will naturally make the lights read as glowing.