According to Osho, when trust doesn't arise, don't make '100% trust' another goal. Forcing it breeds hypocrisy and inner division. Real trust means accepting whatever is present: trust or mistrust, love or hate, without correction or comparison. Relax into let-go: when trust happens, it happens; when it doesn't, that's also included. This unconditional acceptance is authentic trust and ends the anxious ladder of self-improvement.
Just stop trying to force trust; allow your mistrust too, relax, and let life be.