2nd Chances never work..into the Rubbish Bin
Okay, I know it looks and sounds FaceBookish, but it's been my guiding principle all my adult life, the same applies for professional relationships as well. Nobody is perfect, and we all have to deal with difficult and demanding people or clients. Nonetheless, it takes a more than a certain amount of unreasonableness, malice or entitlement to make it toxic. I have seen time and time again that a 2nd chance never works out, in fact it fizzles out even faster than the first... So to the rubbish bin of relations it is... And some people are sent there right after the first meeting...to hell with the potential business opportunity lost!!