" I think the price will rebound, so let's loosen the stop-loss a bit" — does this sound familiar?

This is exactly how the most common trading pitfalls begin.
When your position direction is opposite to the market trend, you often hesitate to close the position and cut losses, and your mind starts to find excuses to keep holding.

Initially, you just expand the stop-loss range, then you might develop the idea of "averaging down,"
and sometimes you even simply delete the stop-loss order altogether.
At this point, you have broken away from the discipline of your trading system, just stubbornly holding on out of fear of admitting a mistake.

Decisions are no longer based on analysis or data, but are driven by the wishful thinking of "hoping the market will reverse, at least allowing me to break even when exiting."
But the market never cares about your expectations.
The insidiousness of this trap lies in its wrapping in self-justifying logic,
where you gather various reasons to convince yourself that the price "should" turn in your favor.
However, if you move your stop-loss without objective basis after entering the trade, your trading plan has essentially been broken.

What should you do?
Once you realize you're holding on stubbornly due to hope for a reversal, close the position immediately.
This is not self-punishment, but a way to restore rational judgment and preserve your capital.
Positions driven by wishful thinking will ultimately erode both.