Constructive criticism is perfectly fine. There is a difference between "May I suggest an Executioners Calling to deal with the Raka heals. It is 800 gold." and "stupid, get an executioners calling to deal with Raka, otherwise you will suck even more."
Intentional feeding is not okay and Riot disapproves. Feeding because you are just bad at the game is perfectly fine though. Because bad games happen and sometimes you just get the short end of the stick.
Freedom of speech applies to things involving the government. Riot is not a government, therefore they may have their own standards as long as they don't break the law.
Everyone is a winner? When did Defeat become a synonym to Victory?
Real men? Are you implying they are robots? Because otherwise, anyone with male genitals would be a "real" man. Even if some are femboys/traps, they are still technically men. They probably even have "real" women there too.
Yes, don't spend a dime on Riot to make and level a free account. Instead pay money to something or someone else to get an account that may get banned for account sharing/botting. Brilliant.