Hi there. I usually say that focusing our attention on our negative thoughts is like feeding a tiger and expecting he won't come back for more. In a way it's like being caught up in a sort of "hamster wheel", and it can feel very tricky to get out of this trap. You have tried some interesting things that usually help in turning our attention elsewhere (e.g. drawing, meditation), but I think that the first step you might want to try is to observe and study your relationship with your thoughts. Most of the times we learn to take our thoughts very seriously, and we dedicate a lot of energy and time analyzing them. Well, this only reinforces them, and it can even feel that our life is basically what's going on in our heads. So, if you have negative thoughts all the time, it can feel that life IS those negative thoughts. What usually helps is changing the way you interact with your thoughts. Instead of giving them so much attention try to simply observe them, like someone who observes a cloud in the sky. Don't cling to them, or feed them, instead, focus your attention in what's in what you are doing, no matter how trivial it might seem (e.g. drinking a glass of water). It is quite normal if your attention is constantly jumping from your thoughts to what your doing, but if you insist, soon enough you'll feel that the "connection" between your attention and your thoughts will become weaker, as you train yourself to root yourself into the present moment. You can try this anywhere and at anytime, and if you have nothing to focus on, try to use your senses (e.g. focus on your breathing/hearing/taste). The more you focus your attention on the "now" the less you'll live your life through those negative thoughts.
Hope this helps a bit, best of luck!