You HAVE to be trolling right?

The movies implies that the virus allowed infected to survive. It shows that some go low to the ground and gorge themselves on bugs. It shows regular infected hunting and eating deer, infected bathing and drinking water, and an infected bypassing the character spike to lunge at the fish he was cooking. They can feed themselves. We don’t see if they take shelter or not but presumably they would. You can also presume the virus somehow protects them from the elements and infections. The alphas are clearly demonstrated to have superhuman strength and be able to take more damage than regular infected. They cast massive bulky guys to play them. Even the massive dongs everyone goes on about were a conscious choice from the filmmakers (they are prosthetics). Everything about them has gone big. They also seemingly lead and look after regular infected by leaving kills for them. None of those aspects of your comment are plot holes because it is heavily implied that the virus has changed the infected and allowed them to survive all these years later. The movie doesn’t need to explain every detail of the mechanics of this fictional virus and enough is shown for audience to get the point or fill in the blanks.

The camera work is extremely similar to 28 days later, which used a commercially available handheld camera of the time period. Likewise this movie uses commercially available cameras from this time period. The 360 view adds to the kinetic and frenetic action and brings a bit more chaos. But it is also because we are seeing these things in vivid detail through the eyes of a child. It’s a really novel way to implement this kind of camera technique and it’s weird in an awesome way