Over 40% CDR

So I am a kinda new support main and I noticed that almost every (AP) support item also has CDR in it. I find myself getting 40 % CDR VERY quickly. Thus it feels TERRIBLE (in my head) to have above 40% CDR, like it just feels like wasted money. Does anyone else feel like this and do you just carry on with it because the item itself is very good itself so you can just ignore the overkill of the stat (like Frozen Heart, for example) or should I change my buildpath because its actually just wasted money?
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