I disagree. Most of the criticism is not about rewards (come guys evil path has the best reward right now) per se, but about incentives. Some reason to get up of our lazy evil ass and lift a finger for the evil team.

Larian's Biggest Oversight, what to do about it, and My personal review of BG3 EA
"74.85% of you stood with the Tieflings, and 25.15% of you sided with Minthara. Good outweighs evil, it seems."