I feel like it makes me feel like crap and my brain weird every time I try it and searching my spreadsheet shows this effect many times when I forget and read something like the above article and try it again. Anyone else feel like this?

Are you increasing your water intake when you do? That sounds like dehydration. Creatine takes a large amount of water to appropriately process, and during the loading phase, your body is pushing substantially more water into your muscles. Anecdotally, if I don't drink something like an extra half gallon of water a day while loading at 15g/day, I show symptoms of dehydration. And I'm already drinking somewhere between a half gallon to a gallon a day.

I think I do but I guess I could try.

Yes I can definitely “feel” it when I take it, especially so at 10g+. And it makes me overly reactive and somewhat irritable, and gives me a ton of energy that needs to be let out lest the former two get worse.

> searching my spreadsheet

What does this mean?

They likely keep a journal of their mental state in a spreadsheet? Generally a good idea

I keep a spreadsheet about my health, blood work, any supplements I take, how they make me feel etc. The summary would be that I take zero supplements now haha. I have tried so so many.