Actually democracy doesn't fit into the doctrines of Communism, Communists of India had to work within the democratic framework of India, but they never really had any respect for it, so they devised every kind of methodology to undermine the democracy and ensure one-party rule through "Scientific rigging" and hallmark Communist oppression through its rogue cadre.
And TMC was always a party without brains or policies, and when these rogue cadres and goons switched to TMC for better prospects, the TMC thinktank (or whatever it is
) had no clue about how to control them, so goons are getting a free run nowadays.