While yes, creatine does have health benefits, some people may find that creatine increases some certain people with underlying kidney problems and can cause liver or kidney dysfunctions.
Digestive issues are also another potential problem; nausea, diarrhea, and stomach discomfort have all been reported by some individuals taking creatine.
https://www.healthline.com/nutrition/creatine-pros-and-cons
From a personal experience, I have been taking creatine consistently for around 3 months. My experience has been that while I feel an increase in muscle mass, I can feel gained strength and have tested myself past my limits and hit PR's, that yes, creatine is amazing. But, I feel and look bloated all the time, can feel nauseous, and have experienced stomach discomfort. While these side effects aren't terrible enough for me to stop, it's good to keep this in mind when starting off.