To clarify, OP did not act rudely, but managed to come across as a jerk for YES, having an unreasonable expectation (which limits him or herself more than anything). The expectation can come across as rude or disheartening to those that are just logging in because of other obligations. However, these are his rules and he has every right to make them and people should respect those rules if they enter the party.

To the OP, just realize that you're limiting yourself. Since it's still new, the people trying it are likely decent players. You might find a better replacement that learns quickly. And if you're that good at the charging phase, mark yourself and tell him to follow you. Problem solved in a heartbeat,seeing as the first phase is a joke. He will learn it after two or three attempts if he is a good player and if he's following you for charges it can't fail, at least according to you since you perfected this part.