For me, it was the opposite : trusting my gear helped me big time to begin to trust in me.
Except for the spikes, I can't overcome my mistrust.
My (self) learning class was for the most part in a valley's bottom, with plenty of water and the big trees which come with, poplars and ash trees, from 80 to 120'. Being up there with all of this air around me (many of them were forest trees), holding on a tinny rope, I saw very clearly how I could easily freeze by fear. And I surely was close enough a couple times.
I calmed down my mind telling myself that my gear was well designed with plenty of strength and all I have to do is to use it wisely.
Time to time, when an apprehension comes, I use this again to focus on the critical point at the moment, like a sketchy tying point, a risky move or a difficult cut (hopefully, not all that together !).