Thank you for sharing your personal experience experience which makes good sense to me. Creatine is one of my favorite supplemental nutrition. Although my animal based diet has it in adequate amount I still supplement it for cognitive benefits as I get older. It is the most researched supplement so far. I read hundreds of scientific and review papers over the last 40 years. I also wrote about it a lot. Here is my latest one from cognitive angle to extend the meaning of your great story:

https://medium.com/sensible-biohacking-transhumanism/creatine-is-it-fuel-for-the-brain-f9139807ba6d