That is an unfortunately titled brainstorm. Modest is arguably "useable" by many people already. A better title, if you wished to create a catch-all brainstorm for Modest, might be "Improve Modest usability".

But this shouldn't be an all-encompassing brainstorm anyway. As written it mostly contains references to existing reported bugs. These shouldn't be repeated here. There is a useful, if somewhat hyperbolic, problem statement regarding unread message summaries with multiple accounts. So consider having this brainstorm concentrate on that issue, and retitled "Unread messages summary".

Brainstorms shouldn't be used to vent frustrations. It is okay to be critical, but always remember that criticism will be accepted in the spirit of which it is offered. The Modest developers are people too, justifiably proud of their work. Let's help them, m'kay?