from de goodbye post by the dev of Raccoon for Lemmy:

Different apps are built with different technologies: Jerboa uses Markwon for Markdown rendering, Raccoon uses multiplatform-markdown-renderer, Thunder uses flutter_markdown, etc.

You are not comparing the apps, you are comparing the rendering libraries we (apps' developers) did not even write ourselves.

App was being judged for the 3rd party library that was implemented

Your question:

How did the dev even deal with other bug reports?

Very well, it was faster than The Concorde, everyone that ever contacted him can confirm that right away