Hopefully constructive thoughts: I think you've got excellent data there, but the processing is letting you down. Easily fixed.
The cluster stars are blue-white. That's good. But the background Milky Way stars are the same colour. They can't all be OB stars! Have a look at some of Mike Sidonio's wide-field shots where the Milky Way stars are, as they should be, quite orange, like golden sand.
Secondly, you've pushed the background (too much curves) too hard, so that the background is gritty/blotchy instead of near black, and the main cluster stars, instead of being sparkling gems, are bloated spheres.
You should not need to use any noise reduction at all on an image like this.
These things should be very easy to fix.
Very best,
Mike
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