It's just to many people that hate each other gathering in one place. We are small, but if we where to grow we could face the same issues. We need more users for higher activity but no so many that this ends up vgchartz 2.0.
VGChartz is light when it comes to moderating offenders.
You have people on that site that get banned multiple times for the same dang shame.
On GAF if the same thing happens - they get demoted to Junior member if the offense is minor and if they do it again permabanned.
You got people on VGChartz getting banned multiple times a year for shitposting and yet they are given a short ban notice or their history is swept under the rug for the reason of being "popular" or "active".
That is why - if you let poisonous shame grow - it becomes a infestation which is what you see as a result.
As for the forum growing and becoming like it - it is inevitable - people are different and there are always good AND bad apples in every tree. It not matters how it becomes - it only matters how the management/owners of the forum handle weeding out the good and bad apples apart from each other.
VGChartz obviously has failed on that numerous times despite having more moderators than most forums but I guess that is what happens when you have lazy/lax/non-existent leadership - it tends to rub on you as well.