This could have been written by myself though I'm not sure my IQ is that high but after 4 decades of it I finally found something that clearly and unambiguously works for me and that's mindfullness based cognitive therapy which allows me to take control of my mind and use it as a tool instead of freewheeling negative thoughts on a regular basis. I'm not where I want to be yet but it's very exciting to come to this realization that I can and should control my mind and use it as a tool rather than letting it use me with random unneeded nonsense.