It's especially frustrating when it's abundantly clear the 'writer' has no clue how to write, from terrible grammar, to lazy capitalisation, to bland, trope-driven story ideas. And they'll pay through 'revenue split', as though revenue is at all likely in this scenario. (Given that if they find any artist at all, it'll be a very inexperienced one.)
I honestly feel both frustrated by the abundance of these topics, but also rather sad for the writer (and potential artist) in question. If a collab is formed, it's only going to fall in a heap once both parties realise that revenue isn't going to happen, and that neither the art nor story are of a high enough quality to capture an audience. It's a hard, painful lesson to learn, and it could put these people off creating comics in the future. Not to mention all the wasted time and effort, especially on the part of the artist.
They're setting themselves up for a painful time, and it's difficult not to say anything to inform both parties that they're just not at that level yet.