It depends. Do you transfer after 1 year at CC or upon getting your Associate Degree? If you transfer upon completion of CC, I think you only need to focus on why your target school is right for you, no point in mentioning anything about your CC.
However if you transfer after 1 year in CC then you should focus on how your CC is not academically challenging (literally: not good enough) for you. While if you transfer from an 4-year Univ u typically should focus on why that univ is not suitable to your academic needs. Of course we all know that 4-year univ comes in tiers and some are far better than others but I read somewhere that you should never badmouth ur 4-year.
Also be careful when proving your points. You should focus on how ur CC is "providing a great deal of knowledge but too profession-oriented" or something like that (my 2cents, u probably can come up with something better) and don't degrade ur CC or the admission officer might, in turn, degrade ur CC GPA
I ain't no expert and those are advices I collected and made sense to me, just wanna share with you. Might works, might not, who knows?