Unlike Static Stretching that is recommended for AFTER an exercise or athletic activity, Dynamic stretching can make a good warm-up before you are ready to preform. In dynamic stretching, you increase blood flow, increase the range of motion, and your joints get ready for movement. It focuses on different muscles.
Basically, doing dynamic stretching(which is moving your body while stretching), your body is prepared to move in actual athletic activity.
No, you’re not a bad person. Many of the symptoms you listed are symptoms of BPD(Borderline Personality Disorder)
It can only be diagnosed by a psychiatrist and you would possibly benefit from medication and therapy…if it is BPD, there are definitely ways to treat it and the best part is that after just a little treatment, most people will see an improvement in their symptoms and their self image overall. The sooner you get to a psychiatrist and get tested, the sooner you will know what you’re facing and develop a treatment plan with your doctor….and give yourself a little kindness and love. Don’t automatically believe what you’re experiencing are character flaws as opposed to reasons to seek medical attention.