Some guys challenging other guys' loggings or methods of considering a station heard to be an actual logging, arguing over equipment to a certain extent -- that sort of thing.
That is perhaps the worst of the deadly sins of MW DX. At one point myself, and a couple others, thought we could stifle the naysayers when we got Perseus radios, as we could provide audio clips of what we heard. You could send in your logging and put an audio clip of the reception on the web for all to hear.
That should have put it to bed, but the bullies continued their diatribes accusing us now of trading recordings. The bottom line was that their claims were baseless. However their nonstop braying at every logging which was a good catch got old quick.
Add to that the way you count loggings. If you receive 1270 in Detroit, is that 1 point in the log for "the station", or is it 2 points in the log because they have had two call signs, or 2 points in the log because of two different transmitter site locations. And do you claim an extra point for a station running IBOC since there is an analog transmission and a digital transmission? Is it 3 points if they have two digital streams. The bottom line is that it completely ruins the experience of being in a club. The constant bickering is draining.
I put a lot of the blame on club leadership, which while wanting to be in charge, do nothing to quell the cackling of feral members lashing out at other members. Like you said;
"why would I want to hang out with uptight jerks like this?" Many of us didn't and left.
I find the hobby less frustrating not dealing with malcontents, or clubs. On the other hand, it's great to have a few good friends show up at a location and do some DXing, exchange ideas, and be as excited that you heard Algeria on 891, without the competition or kvetching.