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misplace (one's) trust
To put one's trust (in someone or something) only to be betrayed, let down, or disappointed. I thought we were hiring a motivated team player who was willing to work hard for us, but it seems that I misplaced my trust. Millions of people misplaced their trust in the investment firm, only to have their life savings wiped away in the span of a few days after it used their investments to try to manipulate the market.
misplace one's trust (in someone)
to put trust in the wrong person; to put trust in someone who does not deserve it. The writer misplaced his trust in his editor. The voters misplaced their trust in the corrupt politician.