>>149225302He disliked Linguini more than he disliked Remy. At first he didn't want some newbie in his kitchen, a bit later he got jealous when Linguini's cooking was better than anyone else's, and finally he thought Linguini was secretly a genius mastermind who was playing mindgames with him.
Once he learned that Remy was the cook, he wanted to enslave Remy to work for him.