Disappointed about not changing negative thought yet

When I do a model it helps me identify the thought that is a causing my feeling/action/result. Then when i do an intentional model I see how changing the thought could definitely help transform everything. I think seeing those two models together side by side however, immediately makes my brain think that the fix is so easy — just think the new intentional thought. Then I become disappointed at myself when I havent made that “easy” change yet. I know better but I’m not doing better. So it’s almost like there’s an additional layer of negative thought. The original negative thought, then negative thought about not having yet changed the original negative thought. Do you have an outline or chart that simply lays out the full process to successfully think (and believe) the new thought?

Have negative thought
Do a model on it
Aware that negative thought is causing feeling/action/result
Create new intentional model