The people you need to be angry with are the current government, not paramedics, Nurses, Doctors or any other HCP!
And those who voted for them, who plainly don't give a damn about MH provision, until it actually affects them in some way.
You're more likely to get admitted to a psych unit from police custody than from A&E. A couple of clients have gone down this route in the last few months, thankfully only by causing some sort of disturbance or committing criminal damage.
MH services are so stretched that they can't possibly meet the need, which has increased since the pandemic. They're losing really good staff, because they are utterly demoralised by not being able to give people the help they need.
I have an ex-client who struggles with paranoid schizophrenia. They're supposed to have a fortnightly visit from a CPN. That all stopped in the first lockdown, they've had a phone call every few months, and 2 telephone reviews with a consultant in nearly 2 years. When they asked when visits or F2F appointments were going to resume, he was told that there were no plans to do that yet, because of cuts. He is really unwell.
MH services here are in crisis. I doubt if anyone has bothered to tell paramedics that the chances of anyone with MH issues getting meaningful help via A&E are, at best, slim.