If we assume it can have that effect, then a high dose would probably make it more pronounced. If, however, the loss is secondary and caused by DHT conversion then it boils down to whether testosterone is converted to DHT while the levels are temprorarily elevated. I don’t think there is anyway to know when that process occurs.
Even if we assume that DHT conversion occurs during that state, I’m not sure any amount of creatine would matter that much. While high intensity workouts do spike testosterone levels, creatine tends to only elevate that intensity moderately (little heavier weights/extra rep or 2), rather than dramatically. Personally, I never found that creatines effects were amplified by increased dosage. It works by drawing more water into skeletal muscles, thus allowing for more efficient ATP conversion, but your muscles can only hold so much extra water so the benefits and effect are capped. When that happens your body gets rid of the rest via urine.
Loading gets you to that cap quicker, but the result is still ultimately the same. Once you hit the cap your body just gets rid of the excess, so I don’t think that loading would make a huge difference as their is no excess accumulation. The only thing I can think of is that the load itself shocks your system a bit more by maxing the levels quickly intstead of gradually drawing more water and blood flow to your skeletal muscles. Dehydration is always a problem, as is blood flow, but the affects on hair usually result from a consistent, persistent change. If you are hydrating extra and keeping a vitamin sufficient diet, then it doesn’t negatively affect your body. The blood flow could in theory be an issue but we are only talking about the pump from a workout being greater, not full time diversion. You would need it to consistently deprive the scalp for it to damage your hair follicles to the point where they wouldn’t regrow.
Looking at your timeline, one thing that jumped out at me was you stating it happened 3 months or so after starting creatine. This time table fits the effects of Telogen Effluvium. Usually, Telogen Effluvium happens within 3 months of a severe shock to the system. While I wouldn’t expect a creatine load to do that, everyone’s body is different and perhaps in your case it did. That being said, hair lost during an incidence of Telogen Effluvium usually returns within 6 months of The triggering event.. In your case, if the creatine load was the trigger, your hair should have started returning by now. If, however, the general presence of the substance was the issue, it may not return until you have completely removed creatine from your body. If you haven’t stopped creatine entirely, that may be the problem.