[mkagenius]

I have been on the other side of table where a coworker told me that my code was complex.

But at doing that he appreciated the code that it worked as expected and how quickly I made it work, he taught me that in long run though, how a complex code would lead to various bugs.

Show him examples, show him how to refactor that and convert the same code into a beautiful code.

So, my advice would be to give something back to the developer in case you want him to listen to you.