So, there are quite a few flaws with your position.
Firstly, for some reason, you're putting the lens on trans people, and not cis people. Cis society does far more to encourage and sustain gender norms than trans people ever will, simply because there are so many more cis people. If you are genuinely concerned about the harms of gendered roles and how they sustain gender inequality, you should be more worried about the source of those behaviours, and not trans people.
Secondly, if your concerns are about the harms of gender norms, then you should probably acknowledge that trans people are more harshly judged and punished by those norms than cis people are. Trans people have their gender denied to them if they don't perform their gender sufficiently for society. They get misgendered, they get their rights taken away, they get denied access to bathrooms. And to top it off, trans people are also punished for performing their gender roles, and that punishment, again, often takes the form of denying trans people their identity. "If you were really a woman, you wouldn't need to act so feminine to show it"
Thirdly, the premise that "transitioned people are doing their best to fulfill the roles and stereotypes assigned to their desired gender" is incorrect. Or rather, it's as correct and incorrect as it is about cis people. Some trans people adhere to gender norms. Some don't. But again, the difference is, trans people get punished more often and more strongly by those norms, whichever side of the fence they fall on. Your post here is an example of that imbalance, because you are blaming some of the biggest targets of societal inequality for that inequality, despite their complete lack of power and influence
There is no "two sides" here. Enforced gender norms hurt everyone, but they impact trans people more. The idea that there is "two sides" is an example of that. Blaming the victims for their own mistreatment