Hard to imagine this was once a developer I had respect for and willingly supported with every release. Now they release buggy and unpolished games and complain about how toxic and ignorant their playerbase is for not giving them overwhelmingly positive reviews like so many other games on Steam have. The issue with trying to hide from your ratings on Epic is it makes people wait and look harder, like at the current metacritic scores, that's going to give anyone pause now isn't it. Maybe these critic reviews are just too toxic and prone to abuse though.
Early Access games are in fact buggy and unpolished games. They are offered for sale in early access as Alpha and Beta test phases to buyers who wish to become testers to and report bugs, flaws, games play mechanics issues offer suggestions and ideas to polish game and make the game better.
This is what's ongoing right now with GC4 on EPIC Games. Thousands of eyes pouring over testing new unreleased updates and new features to make sure they work as intended while also suggesting ways to make such features work better. You can follow development on GC4 discord channel or right here in the GalCiv4 official fourms. Epic Games has no review board so nothing is being hidden.
I'm afraid there are many user who leave reviews that do not know the difference between a buggy and unpolished early access game in the Alpha and Beta test phases and the more fully developed games. I can only suggest if you rather not be a game tester wait to buy it or sit on it and let it update until the game is out it's buggy and unpolished early access testing phase.
Negative Reviews for buggy and unpolished games in early access as mentioned above are unmerited because many users do not participate is the Early Access testing leave negative reviews on without understanding the game in still under testing and development. This Isn't because a game maker is afraid of the review process. It partially because some users are ignoring the fact that it is in fact a buggy and unpolished early access game still being developed and tested, leave unwarranted negative reviews completely disregarding that.
I hope this helps.