"Can't deliver the service as expected" is par for the course in innovative early stage startups. Veteran tech companies like Apple, Microsoft, Cisco, Intel, Oracle, etc., struggled hard and failed to deliver as expected for many years. And still do. Apple computers and OSes in the 90s were unusable garbage; you spent more time twiddling extensions than actual use. Remember Windows 3.1x? It was an utter failure of an OS but the only available solution to many businesses. Time will tell how Coinbase evolves but my take is they'll continue to improve and catch up to demand.
It can't provide the level of service expected for financial services of this sort. That doesn't imply they should give up and go home, but it does mean that one should temper one's expectations of being taken fully seriously.