Not defending him but I honestly don't think that LVG sounds heartless or is a disloyal person. In fact, I believe he's the opposite. His frank ways seem to rub some people up the wrong way and that's fair enough, but I don't think that suggests' he's disloyal etc.
As for being ruthless, sadly it's the way it has to be at the top.
As for RVP, what should Louis have done with him? On his wages and no doubt wanting to be on the team sheet all the time, he needed to produce on a consistent basis. He did it for one season and then went awol for the next two seasons whilst taking home over £200,000 per week. In the manager's position, surely you have to let him go?