Turning points are vital in storytelling. They support the major changes that most stories need to make a satisfying conclusion. The most common flaw I see is a failure of justification in the Battle of Wills (where did the strength come from?), the gesture of goodwill (what justifies making it or accepting it?), or other situations where the character's change of mind or the effectiveness of an action is not justified. If they keep doing the same thing that failed earlier, but it succeeds now without changing anything else, then that's jarring and frustrating to me. I want to see the character make a discovery, change a variable, or do something else that creates real leverage to divert the path of the story.