I agree probably Rossi was better than Lorenzo will never be. But his rivals back in the day weren't as good as Lorenzo, Stoner and Pedrosa. We cannot know who's better. For many Schwantz was the best rider ever, who knows.
About people disliking Lorenzo's personality:
First: it is motorcycle racing, not hairdress gossip.
Second: just do not trust what you can see on TV. Poor Simoncelli seemed evil on spanish TV until he passed away. Then a lot of tapes appeared showing that he was actually quite a cool guy. TV sucks.
Something similar happens to Lorenzo, Pedrosa and Stoner -he raced in Spain too before the world championship. They are mostly childs raised inside a bubble. No social skills. Lorenzo's father is a real madman who owned a racing school. It is great that he is half normal. He even didn't have a motorcycle riding license until past year -there is a video of him at the driving school, he isn't bad
, but now he has to ride restricted