The current polarized review system of Steam is highly susceptible to the influence of players' emotional expressions. As a Chinese player, I also know that there are many Chinese players who give a negative review just because a game does not have Chinese language, which is unfair for any game (and you guys therefore have also introduced a language based evaluation classification option). However, to be honest, this is just scratching the surface, because basically, this polarized evaluation system it just will induce players to make biased expressions.
Long time ago, when we players found a game that we didn't like, we had a simple choice, which was to "not play". But today's Internet makes it seems "every game should make everyone happy". And to be honest, this is a joke, because human beings have more differences than all the current game genres, SO how can you expect everyone to be satisfied in just one game? And, this kind of "diversity" is precisely what the current evaluation of Steam's two poles cannot reflect. Therefore, I propose the following suggestions:

Make a separate comment section outside the current review system, and in this area, players who have "completed this game" are the only guys to be allowed to leave comments here (and this can be screened through the current achievement system). At the same time, there are no "recommended" or "not recommended" option in this comment section, but only messages from "old players" to "the new players" who are interested in the game or to the game's production team.

The benefits of this approach are twofold: on the one hand, it can exclude players who have not been able to fully play the game for nomatter WHAT reason, so that the more comprehensive comments can not be submerged in the ocean of all the players’ reviews.
And on the other hand, these comments are also more valuable for the new players and the game's production team, because these comments are not just based on people's "evaluation right", which was bought by their "money", but on their "time", which is much more precious than money.After all, THOSE who are willing to spend their TIME fully experiencing a game, in my opinion, are the GUYS who are qualified enough to evaluate this game.
(As for some games that are really poorly made, the best evaluation of them is that: THEY ARE IGNORED :) )

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目前的steam两极分化的评价系统极易受到玩家情绪化表达的影响。作为一名中国玩家，我也知道有很多我国的玩家仅仅因为游戏没有中文就给一个游戏打差评，而这对一款游戏来说并不公平，于是为此你们还出台了一个语言区域的评价分类选项，但说实话这不过是治标不治本，因为从根本上这种两极的评价系统就是会去诱导玩家去做出偏激的表达。
很早以前，当我们遇到不喜欢的游戏时，我们有一个很简单的选择，那就是“不玩”。但时至今日的互联网已经弄的好像每一款游戏都要让每一个人都能玩得开心，说实话，这就是个笑话，因为人类自身的差异性要比目前所有游戏的种类加起来都还要多，那你又怎么能期待人人都能对一款游戏感到满意呢？而类似这样的“多样性”，则恰恰是目前steam两极的评价体现所不能体现的东西。为此我提出以下建议：

在现行的评价系统外另开一个评论区，这个区域只允许“把这个游戏通关了”的玩家进行留言（可以通过现有的成就系统筛查）。同时，在这个评论区不设”推荐“和”不推荐“，只有通关玩家们给对这个游戏感兴趣的新玩家，或是给游戏的制作组的留言。

这样做的好处，一方面是可以排除掉因为各种原因没能完整游玩这个游戏的玩家，从而让通关玩家们的相对来说更全面的留言能够不被淹没在前者的汪洋之中（无论他们给出的是正面的还是负面的评价）；其次，这些评论对于感兴趣的新玩家以及游戏的制作组来说也都是更有价值的，因为这些评论基于的不是人们靠金钱买来的”评价权“，而是他们比金钱更加珍贵的”时间“，愿意花时间去完整体验一款游戏，在我看来这些人才足够有资格去评价这款游戏。
（至于一些真的做的很差的游戏？那么它们的无人问津就是对它们最好的评价 :) )