Making sure toxic people and toxic environments don't take over your life

What do you do when peace and happiness are just around the corner, but getting there is full of toxic obstacles that you feel powerless against? There may be priorities and values in place that need to be changed, but that's not all. When you don't make the changes you need to make, you end up holding on to resentments and building a wall around your heart so that you connect less and are more unhappy in general.