If you don't trust enough, you're viewed as controlling, cynical, suspicious and skeptical. If you trust too easily, you're thought of as naïve, gullible, vulnerable and foolish.

What is it called when you are too trusting?

confiding, credulous, gullible, innocent, naive, optimistic, simple, unguarded, unsuspecting, unsuspicious, unwary.

Is being too trusting a weakness?

Being too trusting can be a weakness if you allow the toxic actions of a few to negatively impact you or your team. All it takes is shifting your view and actions, so that you don't live in a rainbow coloured world where everybody is lovely and gets along well.