Furthermore, I have noticed, as previously stated, there are guilds that band together and end up staying at 1000LP. My guild is in it's second season at 925LP and the difference in attitude and game play when compared to those (bullies) at 1000LP is huge. The make up of selecting the guilds per battlefield in diamond have some selection process based on LP and has an inherient division in diamond. If we could stay at 925LP GBG would be great.
It is that bully mindset that has you seeing things wrong. There isn't near as much banding together as you believe. There are probably cases of it in Diamond league, but not much in the grand scheme of things. Most alliances end up being unspoken informal things based on more than one guild disliking one of the other guilds for whatever reason, and ganging up on them.
On any given world there is usually one guild that is flat out better than all the others, and in most cases they will always prevail.
Then there are a couple of more guilds that can almost match them.
Next there are some guilds that can pretty much destroy anyone that isn't in the two above groups, but will consistently lose to those first two groups.
Then there are all the rest. Some better, some worse, and their performance likely varies greatly from week to week. They don't have the power to compete against the top 3 groups, and are going to find themselves locked out and picking up scraps every time they run up against one of the stronger guilds.
Everyone playing just wants to get in as many battles as they can. Since those top guilds are always gong to dominate, if you get only two of them in a season they are going to end up being the ones trading back and forth, and everyone else is left looking for scraps. There is no alliance needed. The only likely agreement between them is to leave camps up and not trap, and that is simply so everyone doesn't have to spend as many diamonds to build camps all the time, not because of some desire to lock everyone else out. In those seasons, the strong prevail. Since most of the top fighters have ended up migrating to a handful of guilds, it shouldn't surprise anyone that guilds lacking those top fighters are going to come up severely short. Having one or two top fighters might be enough to get you into Diamond league, but it isn't likely enough to keep you there or keep you competitive.
If you get more than two strong guilds from the first 3 groups, then there is either a lot of battling going on, or else 2 still dominate. If you get one strong guild and 7 really weak ones (comparatively), then the strong guild is going to wipe the map, then wait, and wait, and wait hoping that one of the other guilds takes a sector or two so they can get some more battles in. Again, scraps
I guess every weak guild hopes for 7 other weak guilds that they can go up against, but that doesn't often happen, so the weakest guilds get sent back down to Platinum after a season of doing almost nothing. Or, as appears to be the case more often, actually try to lose to get out of diamond.
In the meantime it is always going to be two, maybe 3 guilds at most winning the vast majority of the battles, and hence provinces. Everyone else is just so much background noise. Doesn't mean they are plotting to keep you downtrodden or trying to bully you. You simply don't have what it takes to compete.