I'd argue that last 7-8 La Liga clubs (Messi's preferred targets for pumping up stats) aren't stronger than their Italian counterparts. They might even be weaker. But this again has nothing to do with the post you quoted. Can one say that dislikes Messi and eventhough he's one of the best players that has ever played, his style of football isn't nearly as exciting as some of the greats of the past, without bringing Italian clubs into it?
He's scored more than 20 goals against Real Madrid(more than any other player in classico history), and has a similar number of goals against Sevilla, Valencia, and co. So that statement of yours is absolutely not true.
As for the bolded, ya, theres nothing to argue about if you acknowledge his quality. Your comment about how he scores only against the small teams doesn't give one the impression that you concede that he's one of the best to ever play the game. If you acknowledge that, then ya whether you think he's entertaining or not is a matter of taste.