You're not leaving because of an "ad hominem" attack - there was none, your person was not attacked. You're leaving because your attempt to malign a perfectly good project with underhand emotive phrases like "broken architecture" hasn't washed and now there are too many valid arguments ranged against you.

Some of the points you raise are fair and in most contexts would probably have been constructively accepted. Feel free to draw your own conclusions as to their veracity  or severity, but if you're going to make posts bordering on propaganda dressed up as technical appraisals, don't be surprised if you get challenged over it.