Best way to not be depressed and angry all the time ?

Depressed : There are several answers depending on the situation. The most common resolution of this is forgiveness of things in the past, supportive therapy, and most of all reconciling your responsibility with your emotions. Often people use anger as a maladaptive way to bully other people and get their way, and any confrontation of an angry person often puts the confronter in the fire of the same behavior.

Depressed & angry: Start w a medical evaluation to rule out medical causes of your symptoms. Medications are sometimes indicated. Talking therapy to include Cognitive Behavioral therapy or psychotherapy can be effective. Aim for daily exercise, 8 hours of sleep per night & good nutrition w 5 servings of veggies & 4 of fruit per day. Try tai chi, yoga, Qi Gong, progressive muscle relaxation, deep breathing exercises

Exercise: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Wish you good health!