To be honest bitcoin is not that easy to handle, to think the transaction fee is a bit higher to spend small amount for online shopping. But the advantage of using it privately is completely solid since no names, birthday or whatsoever information needed from sender and receiver.
Bitcoin is still new technology, eleven years is not enough to completely understand its value, what it really needs for. It is being slowly adopted first among cypherpunks, cryptographers, then among technically-savvy people and last among ordinary users who don't know and don't care about technologies behind bitcoin. The latter need user-friendly intetface, infrastructure, regulations to start using it on everyday basis. Bitcoin is not user-friendly yet, people usually have to do some research before start using it. That is the problem that slows adoption, but it doesn't make bitcoin bad, time hasn't come yet.