Timothée Chalamet was, until very recently, Hollywood's golden boy and a frontrunner to win an Oscar this weekend - so is the backlash he has faced about more than his views on ballet and opera? When Chalamet recently said "no-one cares" about ballet or opera any more, he clearly wasn't expecting people to care enough about the remarks to ignite a furore. How wrong he was. It turns out a lot of people have very strong feelings about ballet and opera, but even more so about Chalamet himself. "He's an absolute fool," theatre critic and arts broadcaster Ian Brown told BBC Radio London on Saturday.…