Yes, of course there are many variables and it's impossible to truly isolate them from one another, and this is all coming from my non-objective viewpoint.
I don't expect to find positive experiences everywhere I go, or every night that I go out, I'm just sharing a personal observation, which is that so far I usually have my best dances at smaller events, and it's making me wonder whether there is something about smaller events or venues that might affect attendees positively, or conversely wether there is something about large events that might have a negative effect.
And yes, it is quite possible that my lukewarm experience was in large part down to me - that I feel more comfortable at smaller events, and therefore my ability to connect to my partners are better in those circumstances. However, if that's true for me, I would think it's also likely to be true for a few other people as well.