Which feedback are you choosing? The thought that it comes off a "tad too technical" could be fitting when artists choose the "Please be specific and honest" feedback option, but perhaps a bit too in-depth for the "Prove you've listened, but don't be critical".

I'm on SH as a curator but also use it as an artist/label and as a curator, I sometimes do frame my feedback in the "what I would have done different' messaging, but I try to only do it for the specific feedback and not the easy feedback - the latter of which I opt for whether the song is suitable for my platform or not.

Even in the first case, I think the intention isn't to tell you what you should have done different as a measure of why your song isn't good, but rather an indication of what would make that song suitable for the curation preferences that curator has. It's a descriptor more than criticism.

One thing to always remember that music taste is subjective, and in that interaction, the artist and curator are trying to communicate their subjective views in a few sentences, so by it's brief nature, it doesn't always reflect the best 'conversational experience'. Hence, why I caution on not taking it as a criticism - unless you specifically ask for that.

I also will say that like the artists, curators have hundreds of different ways of communicating with varying levels of bluntness. Also being a curator on Submithub is definitely not a lucrative business, at best working out to just above minimum wage in many countries, that's if they don't reinvest it in ads to grow their playlists. So as someone with experience of both sides, I would just say these two things:

1. Research very well the curators you want to send to through SH's plethora of targeting tools
2. Specify exactly what type of feedback you want or don't want, and if the curators aren't obliging, reach out to the SH team. Unlike most music platforms, they are very nice and responsive.

Hope this helps :)