I can't think of another actor who could pull off that kind of manic smothering "helpfulness" without simply coming across as unhinged. I tried to search for reviews which talked about the dark side of this picture but even adding "creepy" or "creepy guy" to the search fails to turn up anything significant. In fact, I found a recent review by a feminist cultural critic calling it her favourite movie without evening so much as mentioning the problematic aspects. There's something about that guy's appeal that just seems to circumvent the ordinary ability to spot red flags.