Bad faith
From Conservapedia
Bad faith is acting with dishonest intent — saying or doing something while secretly aiming for a different outcome. Pretending to engage sincerely while actually trying to manipulate, delay, sabotage, or avoid responsibility.
Bad faith can be not negotiating, debating, or participating in good faith ways, even though you appear to be.
In law or contracts bad faith means intentionally misleading, withholding information, or acting to undermine an agreement.