They are wrong to be comparing you to others. We each walk our own path. It is not failure to revise your plans. What your parents are doing is very unhelpful. Look for the things in your life that are working for you and build on that. A marriage for the sake of being married is a poor idea, you are wise not to settle. A marriage can bring a lot of pain and misery if it is not the right person. I hope you will make some new friends soon or be able to reconnect with old friends. It helps me to walk outside or do physical work outside in the sunshine to relieve stress. It's helpful to focus on what is going right rather than what is going wrong though sometimes it is a search to find those things. Long slow breaths help and meditating on things you are grateful for in your life or things that you do well helps with stress.