In theory this is why they have to be licensed but in practice that consistently leads to the profession capturing the licensing board and using it for protecting the providers rather than the customers.
I find it near impossible, even as someone with a lot of legal knowledge, to tell whether a lawyer I hire is going to advocate zealously and correctly and comprehensively on my part once I hand over my retainer. They all talk a great game.
Problem is, the pay out from the government for their services is atrocious, so not many are willing to go onto the list. And the ones who are, aren't the good ones.
My duty solicitor on the day of my arrest kept making comment that he believed I committed the accused offence (I didn't). Mostly because he didn't understand it it, so that's proof enough it seems.
He then sent me a letter outlining what he understood, which outright stated he believed I did it (again, I didn't). Dropped him like a hot stone when I got charged, and paid for my own. Who after some research was actually half-good.
Then the barrister I had at trial said "You'll likely go down, the judge you have is a bastard, and has sent a lot down", great..
And now when I'm trying to get some reconciliation for all this nonsense. The legal firm I hired to sue, are ignoring my instructions and went for something entirely different and offering a whopping £1000 compensation.
My legal costs alone were many times that