So far what I hate about bitcoin is about lack of adaptation bitcoin as payment.
I hope in near future bitcoin can be use in many places, so I can do transaction easier.
this problem has solved with bitcoin debit card, it can be used worldwide,and easy to make,just buy a plastic card,load it with bunch of dollars,and use it anywhere,even it'll took a higher fee than paying with bitcoin directly,it's quite helping
agree, but again, is the final user who need to adapt himself, i'm not saying this is bad at all, but if vendors start to use bitcoin+coinbase
(for example if they dont want to be paid with btc) this will be much more easier for everybody.
so about the main question, what i hate more about bitcoin, is nothing, we are our own barrier.