Yeah I dont necessarily agree that Walcott was a flop.
He certainly didnt live up to the (unfair) hype that was placed on his shoulders from such a young age, when he first moved to Arsenal, and Sven, in a weird, baffling ****ing move, decided to add Walcott, a 17 year old who had played zero minutes of Premier League football, to the England squad going out to the World Cup!!!
People were obviously like "oh this kid must be special!", as in Michael Owen at 18 special, but he just turned out to be a fairly decent squad player.