I think Queen Marie also stated in her book (now it's been a while since i read it) but she blamed a lot of the Personality deficiencies on Queen Elisabeth, and all the interference she caused with both King Carol II, & and HRH Princess Elisabeth (later queen of greece). That being said, I think HM Queen Helen did an awesome job raising HM the King the way she did. The Fact that the King hasn't publicly berated or trashed his late father says a lot about his own character. HM the King said it best to his grandmother : "I have learned not to say what I feel, and to smile at those I most hate." In every picture with Carol, you always see Michael Smiling.
IMO, also the fact that Iuliu Maniu made Carol grant Helen the title of Her Majesty The Queen but carol changed it to Her Majesty Helen, and then became punitive with her b/c she would not oppose the Governments decision to annul the divorce. The Gvt of the day imo showed that HM Queen Helen was in a lot more favor that Carol.