“s/o who worked in/with the CPS doesnt get the link between 'acquittal in eight minutes' and 'this case shouldnt have been brought'”
There is not necessarily the link you imply, Peter. The CPS may have examined the evidence, decided there was a realistic chance of a conviction (and that it was in the public interest to proceed). Witness turns up, performs like a wally in the witness box or conveniently “forgets” all the details of the incident that was mentioned in his or her statement (not entirely unknown, especially in cases of domestic violence). So - acquitted in eight minutes (or even possibly at half time following a “no case to answer” submission).
It’s easy to pontificate about the shortcomings of the CPS from the comfort of an armchair armed with virtually none of the facts. The CPS has all the facts which few people outside the court are privy to. In this particular case all we know is what the OP has told us. Not much to go on and certainly not enough to make the sort of the decision CPS lawyers have to make daily. And you still haven’t suggested a suitable alternative to the system you believe is so fundamentally flawed.
“know an ex copper....he used to work in the Met....you want to hear him about the CPS”
With all due respect to your ex-Met mate, woofy, police officers are not best placed to make an objective assessment of the competence of the CPS. Most police officers work on the basis of “we know Chummy did it”. Fortunately the Criminal Justice System requires a little more than that and the CPS have the tiresome job of evaluating the evidence collected by their police colleagues. When the CPS decides that the evidence collected by the police (who remember, know “Chummy did it”) is not up to scratch the Boys in Blue sometimes get the hump.