It's not so much that people hat the bounty dumpers as they hate how the dumpers drive the price into the ground.
Personally I don't see a fix for this. People only have value for the things they buy, so free coins sold at 1 sat is an infinite return for the dumper.
If they bought at 100 sat and dumped at 1 sat then they really are idiots. if they got for 0 sat and dump for 1 they made a profit and sometimes that means more to AD/Bounty recipients than holding out for a better price.
Also once the price action starts to trend down, the fomo on the rest of the dumpers is strong so it becomes a race to the bottom.