>

The translation here is incorrect. He didn't say Putin is a "nobody". He suggested that Putin doesn't exist, being  either dead or incapacitated, and therefore cannot possibly meet to discuss terms with Ukraine.
This is the second or third time in the last week that he has alleged Putin is dead or at the very least, not making decisions in Russia anymore. 
I'm not sure what intelligence this is being based, but more than likely comments like this are just for public media consumption.
Why would Zelensky want to bother meeting a loser like Putin? >

Already tried that, didn't work