People who say that yesterday was better than today are ultimately devaluing their own existence.
Be mindful of where your mind dwells. Regrets are parasitic, they'll feed on your energy and destroy your spirit.
You can't connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future.
My friend, be careful what labels you take as truth in your life. It doesn't matter who speaks negative labels over your life, don't give them that power over you. It only matters what You take as truth in Your life! You are a magnificent unique masterpiece of the universe. Go forward and be great, strong, and powerful!