What's the difference?
- I have never played COD and not got greeted with toxicity.
- I have never played COD and not been greeted with toxicity.
The get passive is exactly the same as the be passive, except that it is less formal.
In your examples, I have a strong preference for been, but I think that is mostly for aesthetic reasons - the low vowels of COD (if it's pronounced as a word - I have no idea what it is), not, tox-.
I find greeted with toxicity a particularly awkward and unnatural phrase anyway.