I read a quote by an author Andrea Dykstra which said, in order to love who you truly are, you cannot hate the experiences that shaped you.
When I tried to understand what this meant, it sounded a lot like acceptance.
For a long time I presumed that acceptance of the situation meant labelling the situation as correct. But slowly I have come to understand that it just means accepting the situation as a fact or coming to terms with it. Be it global warming, corruption, or any other family situation that bothers you.
Complete understanding of the situation for its facts is acceptance. Only once we accept the reality for what it is, we can come up with an appropriate response to the situation.
If we accepted the situations or shortcomings for what they were, it is likely that we would be able to deal with them better. Even if you are an angry person, it would rather be beneficial to admit you are one, and move to finding reasons why you are angry than being in denial.
I read somewhere, that spirituality is not about being nice, it is about being yourself. Accepting yourself.