Melo is getting to the line danm near 8 times a game, what do you want. 10? 12?
The real reason?
Melo isn't and never has been an elite athlete
reffing an NBA game is difficult, as I understand it a lot of the times refs see fouls, by reading the defender, if Lebron blows past someone or is speeding in the and the defender is in a disadvantageous and physical contact is initiated, they are much likely to blow a whistle, even if the contact isn't severe. Melo doesn't do this nearly as often, he initiates alot of the contact with strength and size, while a defender is holding their ground, much less likely to be called for a foul.
The refs dont hate melo, thats silly, he gets a ton of fouls, for a non elte athelte.