Implying that is how people use X? Continually creating new burner accounts, not giving "the algorithm" what it needs to provide what they really want to see? Seems unlikely.

I suspect those who complain it is a "right wing" echo chamber are using longstanding accounts and actually engaging with "right wing" content, which trains "the algorithm" of their preference to see more of the same. Anecdotally, those I know who complain of "right wing" echo chambers are also the first people to gorge on "right wing" media to see what "they" are up to.