There are thousands that are boycotting Coinbase because their KYC systems take too long, or their deposits/widthdraw take 2 weeks sometimes. Just today I was reading a thread on Reddit where someone was claiming to be currently sueing Coinbase because their account was closed due to them depositing from a bank account that didn't match the name on the coinbase account...
Or people don't use them because the fees are marginally higher.
I just don't get it. If I'm going to put my money somewhere, I want the place to be following every US law, and charge enough fees that I'm not worried they will go bankrupt or resort to shady tactics to make money.