I do begrudge them for putting in placeholders for features for years that weren't functional. Like a map that was blank and entire sections that weren't functional. I also begrudge them for doing things like removing Python 3.7 support 1.5 years before it was EOL. I begrudge them for re-architecting entire features like Open Z-Wave three times over the five years I used them. I begrudge them for asking their projects be removed from other open source projects.
HA is one guy's pet project to goof around with the latest and greatest technologies.