I love these kinds of novels, but in this story the world feels twisted and wrong. The people are making bad decisions for the wrong reasons and are simply too stupid. I will only list the complete big deal breaker for me. SPOILER: Spoiler : Spoiler

It starts with the guy Anya meets in the beginning (who dies to aliens). He wants to have money and be a poser, but why is he so damn stupid. Apparently, people can buy spaceships, why did he not buy one and go asteroid mining? The only reason we are not doing that right now is that it is too expensive to get all the stuff into space. The distance from earth to the asteroid belt is ~3,8 AU (astronomic units), reachable in 1 hour if you travel at 50% of the speed of light. Some asteroids contain several kilotons of platinum and other rare metals. He would have made at least several million dollar per hour, up to several billion per hour (depending on his ship and skills). Maybe he truly was stupid, but you cannot tell me that of over 10,000 people nobody thought about that. Especially those who need metals for robots would absolutely profit from infinite resources.

The second deal breaker is the fact that 60 hosts meet each other and nobody thinks it is necessary to trade the data streams they got from killing aliens with each other. The main problem of hunting aliens are these 3: you should not hunt them alone, you should rest after each kill and you need to know where they are. If 60 hosts split into groups of 5 and If every group hunts 1 (or more) alien every 4 hours they would effectively get 1 data stream every 20 minutes. This would have worked until the aliens grouped up together.

Next deal breaker is the fact that the aliens are a complete joke. Anya killed one without having a class, randomly spending her skill points, hoarding shop money and without a plan. How in the world did 98% of the hosts even die to aliens. 30% of the world population is above 50 years old and therefore should have had access to 2 classes and the respec-tokens. If only 60% found out they had a system and half of them chose a class, you would have around 800 people with 2 classes and 100 with 3 classes.

You can get clones, summons and robots. You can absolutely fight from a safe distance and if you take regeneration and healing skills on top of that, you cannot even realistically die. Just look at how Anya fights and she survives.

The last deal breaker are the tactics in fighting. There are so many scenes where people behave like they just woke up and are suddenly fighting an alien, not knowing what they should do, even though they have been planning for that fight for hours. An example is where they use the second antimatter bomb to kill the 15 aliens in the ocean. After the antimatter bomb explodes, why are all the hosts rushing to get the data streams. Why didn't 2 hosts go there in a mach 10 flying car, ready to leave if anything seems odd. Surrounded by hundreds of robots with another antimatter bomb ready. 1 AI would decode the map data and the other would decode how many aliens they have killed.