“No warranty” isn’t the same as “no complaints”. Otherwise there wouldn’t be an issue tracker and a discussions section.
The issue in question has already gone to crap and your point has been made there as well. It could definitely have been handled better, by all parties involved, but blindly quoting legalese isn’t going to resolve anything or make it better.
An Issue tracker is to track issues regarding the behaviour of the program, not the behaviour of the maintainer.