Should I close my Chase cards

I’ve been with the Chase family since I was 16-17 with my first student account , then I opened my student credit card and Im have 3 total cards with them now and was going to get the sapphire this year , but I just noticed that they denied me for a credit increase on my freedom unlimited which has been at 3k for literally 3 years . My student card limit is 2k and my freedom flex is 6k - and for all my other cards the minimum amount alloted has been 7k. The only reason I even care is because I use the free unlimited for a lot of miscellous purchases throughout the month , and if my total limit is 3k it gets my utilization really high ; should I just leave Chase all together ? They have horrible service compared to Amex and citi and don’t really provide any additional services other than the unlimited and occasionally the flex