The Lightning Thief question

I think its so unfair that the pjo fandom hates Logan Lerman just because the movie was crap. I think he was a good actor, but he doesn't deserve the hate, my lord. Its not his fault that the directors casted him, its not his fault the script was crap, its not his fault that they changed
the whole plot. But people still choose to hate him cause 'he ruined Percy Jackson'.

Another reason is that he did not read the books, which i can agree with.
What are your opinions and why do you hate or not hate him?
Rick Riordan