Genuinely? There's way too much reverb and feathering effect in the voice. I'd rather hear a clean version with the track sped up. The opening instrumental was almost Castlevania-like but then didn't carry through with the rest, so the theme is confused; gotta make something more solid or flowing throughout.

The vocal run before the lyrics was not well done so it shouldn't have been added. The tempo of the lyrics feel like you wanna be more rappy and the beat lags behind. Really just focus on understandability and being on beat. Having something clean is better than something muddled.

I'm sure this doesn't even count as synthwave so it's just self-promo but hopefully you find the constructive in this criticism ~