New MP5 -> Average MP5 -> Veteran MP5
Group A of New MP5s come in, and get beaten up for a while by the older MP5. Then Group B of New MP5 come in, which pushes Group A into the "average" slot, because they now have someone to attack. The cycle continues.
Sanctuaries are there for a reason as well. How many people do you think actually USE sanctuaries? Why SHOULD anybody use them when they could be at GGG farming wins instead of just sitting there waiting for the regen timer?
Back when there was no GGG, new MP5s got the hang of defending themselves well enough, but now that there's GGG, again, why should they?
You, Poppi, are a perfect example. You've used your privilege to create alts well, because you've had a few, and over time, you've learned quite a bit, right? Does it really matter if you can't beat a few vets? Avoid them. It's not hard. At worst, you get a few losses and have to wait for regen, or use free credits, or ask your protector for a heal.