I'm not the target market and I don't have any idea how to use your tool. The UI reminds me of old grayscale Mac OS. Salespeople are (usually, I'm stereotyping) 'dressed to impress'. Maybe you should put a tie on your project.
Seriously. Do you want orange buttons? Specific, actionable feedback, please!
It looks like an app from the 90's. There is zero design. If you want people to use it, you have to sell them on the idea of WHY and HOW they'll benefit. If you aren't willing to do that, then you've already lost.
"There's zero design" - you just said "You're ugly". What is ugly? Should I lose weight? Plastic surgery? Wear different clothes? Tell me what to fix and I can try! But insults get nowhere.
I also think it's very ironic to criticise my design decision on Hacker News. Is there any "copy" here? Design? It's functional. I like the style of HN. But it sure doesn't follow your "best practices" of design.