"Maybe I'm the only one, but I don't like the UI. It seems like a demo for a Material design app. I think the site has lots of potential, but without an original, personal style it might put off users. It doesn't have to be complicated, just something recognizable."

So a standard component library can get you started quickly, but you might want to tweak it. A few things I changed - made icon buttons smaller (the default sizes are way too big), changed the pills to be white with black border instead of just grey background.

[1] - https://linklonk.com