Because at that point in time, the decision made was chosen above all other options.
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We use less than and more than signs to choose a less/more favourable option over the other. You may look back and think, that was a bad decision. But if you think back to that moment, it was your decision; you favoured it over all other options.
No regrets. We all make mistakes. Learn from it and move on. And think about all the good decisions that you have made.