Sure, you can find negative reviews. You can with any game. The vast majority are positive and that's what is important. Negative reviews for a game that is enjoyed by most players are typically either a) the player doesn't really like that type of game, or b) the player doesn't like a specific feature or features and/or doesn't like the implementation of a specific feature or features. You can see such reviews in your example. Such reviews are generally unimportant. You can't please everyone and shouldn't try to do so. If the vast majority enjoy the game, that's what it important. A small percentage of negative reviews doesn't matter. If the percentage is high, that is when you need to be concerned about them.
This game is not in its final form and has been available for play for around 10 years now. Things are going to change. Some players like a specific feature even if the majority don't like it. When that feature gets changed, those players will be upset. That's just how it goes. By playing the game now rather than waiting until gold, you are accepting that the game *will* change. You can't really complain that it's changing because it's a known fact that it will change. If that bothers you, you shouldn't be playing it before it goes gold.
Even comparing certain time frames isn't really a valid comparison. Different things determine how reviews will be at any given time. As long as the vast majority of reviews remain positive, that's what is important. You also have to keep in mind that few people who write reviews will edit the review at a later time. If people write a review before a new release or directly after the release and their assumption of some change is negative, they'll write a negative review and then it'll stay there even if they later realize that they like the change. The same is true, of course, for positive reviews made in the middle of an alpha with no changes in the air. However, people who decide later that they don't like a game are far more likely to change their review than those who initially wrote a negative review, so that will also cause inaccuracy in the reviews and is another reason you care about the overall reviews and not the relatively few negative reviews you hand-picked.
And it doesn't really matter if most reviews tend to be newer players who haven't played earlier alphas. In the end, they don't care about earlier alphas and so their reviews are just as valid. After all, it's not really any different from someone buying the gold version of a game that wasn't in early access. They don't know how the game changed during development and it really doesn't matter to them. All they care about is how the game is now. Will they be upset with some changes between now and gold? Maybe, maybe not. Either way, the reviews that will really matter in the end are those made after gold. And I expect those will be mostly positive.
The simple fact that this game has some of the highest hours played per person of any non-MMO game just goes to show that this is a very good game, regardless of anyone's opinions about any changes each alpha. Trying to drum up negativity by hand-picking negative reviews and posting them here is really just a waste of time. Your negativity about the game's path isn't going to change the path of the game any. And what you or any other person wants the game to be like isn't going to be the same as what others want the game to be like. Some like hardcore challenges, some like just regular challenge, some like it to be easy. Some like to build bases, some like to do quests and loot, some like to kill zombies, some like it all. Anything you do that pushes the game more towards one group than another will make one group happier and the other group unhappier. That's just how it is. In the end, you either like the game and play it or you do not. The choice is yours.
Btw, that review about time to generate a map shows that some reviews just really aren't much use (negative or positive). Considering map generation takes 10-15 minutes or so, even on a slower computer in A20, the person either is extremely impatient or is reviewing an older version of the game (or it wasn't updated in 2022 and that's from back in 2015 when they originally wrote the review). In A21, it'll be significantly faster. But even the current speed is far from slow, considering all that it has to do. If that feels like "55000 years" to someone, then they need to learn patience. And considering many people make maps with third party map generators that can take far longer to generate a map, it's really not that valid of a review.