Your gallery shots tend to have lots of people with their back to you, which tends to be really boring.
These images often feel like you stand in the middle of the room and take pictures.
You rarely have close ups of people looking at art, or they are rarely contemplative .
That's not necessarily your fault, if the art is boring.
Your images have rarely shown any relation between the people, the art, or the artist(s)
I think, as an "event", you have a tough job in this. Maybe these people are just boring.
Maybe the interesting moments are fleeting, or rare, and you can't be everywhere at once.
I shot at an outdoor art show and I spent an hour around one particular sculpture, only to get a few really good (IMO) shots.
There were other opportunities, but I was in the wrong place, at the wrong time. I think there is a degree of luck in getting good images.
This one, the artist is in focus, looking at the guy looking at his art...
What does the venue want from you? Do they just want you documenting that there were people there, or are they looking for something with more emotional connection? What are they doing with your images?