Micro versus Traditional (or aluball prep) is a mixed bag. Yes, in general micro can be more potent. You are essentially getting and eating 100% of the kavalactones in what you consume. On the other hand traditional prep typically tastes a lot better (less gritty) than microgrind and if strained well usually less nausea. Microgrind also has the advantage (when you are new) of being able to control and slowly up the amount you are taking in a nice controlled fashion. Traditional prep has a bit more variability in how strong your grog is.
My suggestion is to keep using the micro to get over the RT, and slowly keep upping the dosage. When I took microgrind I would take 2-3 TBS all at once and maybe another TBS an hour or two after that and would get a strong krunk from it. After that if the taste is that bad, and you are looking to continue look into traditional prep or aluball. Both are much easier than they appear at first and you won't regret it. Plenty of videos we can point you to on how to do a traditional prep. It is now just part of my daily routine.