Concrete Stain

Hi There!
I was wondering if you could offer some insight on this concrete staining project I took on over a very old damaged floor.
I bought: Kemiko Stone Tone Concrete Stain (Aqua Blue) and I’m on my second coat and a lot of areas are not taking the stain but others are. I know this is due to the poor concrete but I was hoping that the color would still absorb more.

I prepped the floors with a neutralizer that was recommended, same brand. We scrubbed the floor, let it dry completely. I applied 2 coats of the stain with a ratio of stain to water recommended so far and the results are underwhelming. I used a plastic sprayer suggested as well off Amazon. I even on the second coat mixed more stain to water to help get a less diluted mixture but still the stain wont stick to a lot of areas. When I applied the stain I made sure to really saturate the floor as well.
I am not sure where to go with this project now.

THOUGHT:
Could I pour some concrete paint in the areas where the stain isnt sticking and let it seep into the design to create a painted/stain combo marble look? I saw a video on “Dirty Pouring” with paint and epoxy and wondering if you can combine stain + paint then seal it together?
Not sure if this is something that I can do since I cannot find any examples online?

Thank you in advance!