Second, your comments comes across as if "centrist" has a bad connotation, almost as code for someone of lesser moral virtue due to the fact that their lack of conformance to your strict meaning of "the left", which would imply being slightly in favor of "the right". A "desire", as you called it, perhaps arising from uncivilized impulse rather than purposeful choice.
In reality, politics is more of a field than a single dimension, and people may very well have their reasons to reject both "the left" and "the right" without being morally bankrupt.
Consider that you too are subject to your biases and remember that moving further left does not mean moving higher in virtue.