This shit could only happen in Brazil.
No one in the Left liked him - Dino, like Haddad, has plenty of enemies; unlike Haddad, his political career was outside PT(he always ran for office as a PCB member), which makes him even more disliked inside PT than his loathsome personality alone would accomplish. The feminist lobby(which includes Lula's moll) wanted a woman, as the new STF member would be replacing Rosa Weber. Lula's supposed candidate was someone else.
So, who the fuck pushed for his candidacy?
Valdemar da Costa Neto(Leader of PL, the party Bolsonaro is affiliated to) - he wanted another guy on STF who would work to undo the convictions related to Operação Lava-Jato. PL is one of the most powerful parties in Brazil nowadays, and in spite of harbouring many which are connected to the former government, AND some of Valdemar's declarations, is more concerned with using its power to extort the government out of its budget(PL is the party that has been granted the highest number of gibs in the current Administration) that with being any sort of opposition.
Nowhere else this is made any clearer than Dino's confirmation; the average Bolsonaro supporter(as many others) holds as much affection for Dino as they do for roaches, and movements allied with Bolsonaro tried to organize a protest against his indication for the STF(which failed to garner much support). Meanwhile(and known to the protest organizers), the Congress members linked to Bolsonaro were following Valdemar's orders and working to confirm Dino. And now one of Bolsonaro's sons is posting on social media as if his allies had nothing to do with Dino's confirmation.
Make no mistake, Dino wouldn't have been confirmed without the support of the so called 'opposition'. This shit only shows that the so called 'Right' is even more ridiculous as a parliamentary opposition as PSDB was back in the 2000s.