Interpersonal conflict, however, can give you the Monday Morning Blues. You can find another job. Bullies too often win. Coping strategies in these cases of dealing with difficult people is avoidance. And you are right to avoid such individuals.
Professionalism only goes so far.
It does not make you happy in your job. It may be that even interpersonal conflict can do some good. It might cause you, who feel unjustly blamed, to prod your group leader to face up to the lone ranger-would prefer to deal with stranger mindset that has emerged. We go when WEGO is not a regular job practice.