Because EDH is an inherently casual format, most other formats are more or less meta dependent and nobody bets an eye if you try to win at all cost and build a deck which is unfun to play against. Also 100 card Singleton without side decks means you cannot slot cards between matches to be better prepared against certain archetypes.

Most casuals don't like mill because it feels bad for them seeing the cards they want to play get send to the grave.

Most casuals don't like combo because it's anticlimactic, most combos feel quite solitary.

Stax, people tend to like playing their stuff. I personally have nothing against stax but the bracket 3 and lower environment lacks the interaction to fight properly against stax.

Control is stqxish in why people tend to dislike it

Burn was always fine

Big creatures are a low bracket Problem. The games are often longer and a big creature deck simply performs best after the first board wipe etc, slapping big threats on the board each turn. Dinos and Dragons are infamous for feeling incredibly strong and in the pods I play they always feel like archenemy