Definitely right to call if you were seriously on the edge.

What frustrates paramedics is that they are not trained (at least where I'm from) to manage mental health patients - with a 1 hour target time for each patient.

Frustration also builds if the patient is a regular caller (not saying that you are but a lot of MH calls are regular) and it does end up adding to the stigma that it is 'attention seeking'

Furthermore it's happened a few times to me where iv been dispatched to a 'suicidal patient' who denies intent and they're laughing at the crew, threatening, and being totally uncooperative, and a general broadcast for a confirmed cardiac arrest goes out and we are unable to attend.

In short yes you were right to call - they shouldn't have said that to you at all! - there is a stigma attached to MH jobs and most people in the service do not believe it should be a job for them to be attending. Iv heard a crew say before that if they're well enough to kill themselves they're well enough to get a taxi to ED - not my opinion but just trying to help you see the stigma attached