I mean you can also say in this same context that something was painful to watch, excruciating to watch, painful to watch.

我的意思是，你也可以在相同的背景下，某件东西令人很难受。

And by own good, I mean so you can avoid another excruciating episode of Calliou, or their relentless pleas for another park day.

为他们好， 当然。 这所的“他们自己的好处” ，指的是你可以避免再次忍受《卡利欧》那令人煎熬的一集，或是他们无休止地恳求再去公园玩一天。