That's why I started my opinion with "one of the things" that makes good art. Another set you clearly pointed out is time and place. The fact is that people do not value negative outcomes or feelings. I think being aware of it, and why you're annoyed or feel hate, is very important. The thing that annoys you about tree carvings tells me what you care about. Defacement of nature and public monuments is also a statement and also art whether you enjoy it or not. There is always something to glean from the negative.