For one Bloco’s majority of votes comes from exactly the opposite of what you say they are. I.e. lower class and less educated people.
I don’t think they have the image of being “betinhos”, quite the opposite. Majority of Betos vote IL, Agrobetos somehow vote chega, and betos who lean left and actually care about social issues now vote Livre. Some of them also voted PAN but fortunately less and less.
The view I have of Bloco is that they are more on the woke warrior side and a bit too much sometimes. The whole, I am more knowledgeable than you is very present in IL and in a way also in Rui Tavares.
Catarina Martins is one of the more empathetic politicians we have in Portugal atm. The Mortagua sisters may have a well off background but they have proven their work countless times and many times outside of Bloco. Marisa Matias and José Gusmão are both almost 50 and no where close to your description of “elite”.
But I guess your opinion is just as valid. For what it’s worth I actually joined them very recently but so far haven’t seen much of anything (apart from disorganization).