oh, I absolutely do. As usual, your post is full of bullshit. Nobody ever mentioned fluency; so I say "get the gist" of a simple conversation, and you reply "in complex dialogue, practically means you can’t understand".
Next, Surzhik is a combination language, an example of linguistic Russification, not properly "slang".
Now, if you want to speak for yourself and say that, as a non-native speaker, you cannot comprehend the gist of what is being said, by all means take that position. I will not disagree with you if you say you can't understand anything. But your stated utter lack of comprehension is not what I am used to hearing from native speakers.
And to cut through all the fluff, and bring it back around to the original point which you disagreed with, we were talking about the Ukrainian accent, which sounds like Ebonics to most Russian speakers.