Hi Slawomir,
It seems everyone has Arachnophilia.
There are infinite versions of this nebula.
The picture has lots of detail - it's nice & sharp.
I think you'll be like me & want to re-process your data.
I would try to handle the brighter areas by layering in an earlier version of the first stretched version with a blurred layer mask.
A colour boost in LAB mode might give you more colour but
then you'll get colour noise so you'll need to do a layer mask to only
reduce noise in the darker areas.
cheers
Allan