If you were accused of doing something, and your friends gave something other than complete support, you would feel abandoned, and quite upset.
This is compounded by the psyche of sports people. They have a bubble of people around them that give them constant support and solve their problems. They aren’t used to being forced to fend for themselves, and often, they don’t consider the needs of the people around them, as the people around them are focussed on their needs.
It would be very hard for someone such as Sutil to accept that someone close to them would put distance between them when they are most needed. Having been brought up in such a bubble makes the feeling of abandonment more intense.