The maintainer is going to use whatever platform they want.
Those who want support will use whatever platform the maintainer is available in.
If you’re an end user needing support but refuse to use the mechanism provided, you’re welcome to read the code yourself.
The downvote button already gets used as a “I disagree” button. Distributed moderation gives more teeth to a “I disagree” button that isn’t particularly helpful.
Practically speaking, go to the Technology community on LW. A lot of perfectly sane and rational takes get downvoted because a bunch of people simply disagree or it isn’t on the right side of the fanboyism everyone’s expected to have on some topic.