I feel like Kanga is more Darkwave than Synthwave.
I'm of two minds when it comes to genres. On the one hand, I feel like it helps direct people to new music that they may be looking for in a specific style. On the other hand, I think it can stop people from branching out into other genres and finding new music they may like by having a predisposed notion towards certain genres, as well as confining themselves to certain genres which they have decided are the only ones they like without having tried anything outside their comfort zone.
Personally, I like genres because they help me neatly categorize my music library and since I have no problem trying new things I don't think I'm preventing myself from finding new enjoyable music.