from my reading of this, the "comrade" wanted to make the trip about the "crisis of political legitimacy" in Cuba and how the leadership are autocratic and bureaucratic. From her article:

But there is a second aspect of the crisis which we did not focus on during this delegation: a crisis of political legitimacy. Cuba’s government is a regime where decision-making power rests in the hands of the Central Committee of the PCC (the only legal political party) alongside its bureaucracy while the elected legislature is a disempowered rubber-stamp committee. Legally recognized mass organizations we met with on this delegation, like the Committees for the Defense of the Revolution, Federation of Cuban Women, and the Workers’ Central Union of Cuba, are loyal to the bureaucracy, while independent political organizing is repressed.

so instead of going to the delegation as planned, she pulled an immature stunt as "protest" to get attention to her "cause" and center the conversation in the DSA about Cuba's "crisis of political legitimacy". This is just open and naked chauvinism, and when the groups she met with didn't conform to her idealist chauvinist pigheaded view, she shits on them and calls them "loyal to the bureaucracy"

Ultra chauvinists like Maria call for debate but they really just want to platform their own ridiculous positions and listen to no one. This is par for the course in what counts as debate among this brand of Trots.