When you have a look at the infographic at the bottom, or directly at his voting pattern on steemworld or steemreports, you will see the issue, and why "constructive criticism" won't help.
Most of his (daily!) high rewards come from all the same people, who he votes in return. This kind of behaviour is commonly called "circle jerking", or in the whitepaper "collusive groups".
They usually justify how they act with "everything they've done for steem", and that it's their stake so they are entitled to a certain amount of returns over the interest on SP and the curation rewards which are designed to be for them. It completely destroys the Proof of Brain idea this platform is built on, and if everyone behaved the same there would be even less going to small and new content creators. While downvotes probably won't make them stop and change towards a more community oriented approach (it did for some, but a lot are very resilient), at least it returns parts of their self-assigned rewards back to the pool from where they will be distributed to others.