Well because other species don't manage to break the barriers as efficiently as we do.
The way regulation works is that species are limited by their environment. If there are many antelopes, there can be many lions. But if there are two many lions, the population of antelopes goes down to the point where not all the lions can survive, right? This is simplistic, but that's the idea (the higher the population, the bigger the impact of a disease, etc).
Because we are really good at changing our environment in order to be more individuals who consume more resources, we escape those regulation mechanisms. By doing this, we destroy most species, including ours.
Now let's not pretend that ants would be better: if they somehow escaped those mechanisms, they wouldn't suddenly vote and stop growing (presumably). The fact is that they haven't escaped them, and we have. Well for a while. Now it's very likely that some kind of mechanism will end up regulating us. Maybe it will finish destroying most species, and it will take thousands of years to "recover" (with some definition of "recover").
What's interesting with us is that we do know we are destroying ourselves and the biodiversity (which is arguably one of the enjoyable things in life), but we can't seem to find a way to fix it.
