You might want to add some specifics and references to back up such a statement. Otherwise it very much looks like a fairly cheap character attack to an outsider such as myself.
Here's Kovid responding to reports of security vulnerabilities: https://bugs.launchpad.net/calibre/+bug/885027
You use open source software that is made by one guy and offered to the world for free, you kind of have to deal with the possibility that that guy has better things to do than fuss over every bug report.
Also, I think a vulnerability that allows unprivileged users to gain root on a system on which Calibre is installed is worth fussing over.
> Something answering posts from fools like you over the years should have taught me a long time ago.
And submitter is correct - he does this often. I recall a security bug that he refused to fix as fixing it would break some convenient feature. That one got really heated, and only when distributions declared they will stop carrying calibre in their package management system did he cave in and fix it.
Nevertheless, I don't see these as obvious reasons not to support him in Patreon.
Did you need Calibre in the first place? If so, what did you end up using instead?