The worst decisions in life are driven by logic.
More specifically by a surface logic divorced from your intuition.
Intuition itself is not irrational. Like logic, it is also driven by data but with intuition, the data is hidden from you. Generally, only the intuitive conclusion is evident.
You may not like someone and not understand why. Maybe something like their eye movements triggered a part of your mind that identified them as untrustworthy.
Don't ignore it. Don't downplay it. Pay attention to it.
Intuition is the logic of the subconscious.