It takes time Sairentokira. Months. I've done around 500 random bg's on my rogue, and I didn't get my first crate weapon of the quickblade until after 300 wins. But I got lucky on legs, chest, ring, bracers from the crates, all of the quickblade.
With my full balanced setup I can get around 155 AP which is almost the same as a glass cannon rogue setup, but with 18 crit and verse and over 1500 hp, as opposed to most glass cannon rogues 160 or so AP, less than 15 crit and vers, and borderline 1k hitpoints.
A good many of my crates came from WSG and AB, because as a rogue I could actually turn games around easier in those bg's by playing objectives. One flag return at the right time, or a few bases ninja capped/defended and it's a win. Sadly though, Eye of the storm seems to pop the most out of the three bg's. According to my statistics it pops around 40 percent of the time, and some evenings like 5 times in a row despite queing up as ''random'', and in eye of the storm alliance seems to dominate more often due to just getting lucky on class comps. They have more druids, resto shams, and mages. This allows them to take mid right off the bat and zerg bases forcing my team to be spawn camped while I SLOWLY try to take a tower, only for some druid to finally come over in the nick of time and retake it. My influence as a Rogue in that particular BG isn't as pronouced as in the other two.
People hate rogues mostly because of bad memories from 5 years+ ago when they dominated the bracket along with huntards. This hasn't been the case for years. The only reason they are still useful is stealth, and we now have a slow thats spammable and an opening stun lock. But long gone are the day's of critting 1500 ambush and 2 shotting people.
They don't like to admit it but in terms of OP classes we are the fourth or even 5th one from the top. Yes, I have killed druids and shamans, but they usually just suck to begin with and I got lucky on procs. Once that kick is on CD it's over if they are even remotely skilled, I'll die of Dots and finally some 800 insta crit if it's druid.
Best thing you can do as a rogue just starting out is to go glass cannon with some crappy crafted swords, chest, boots, legs, slap enchants on all of it and try to find another rogue to stunlock people with until you get your crate items. Once you have about 3 months or so of farming pugs under your belt and you do finally get all your gear like I have, then you can potentially 1v1 some of the other classes.
Ya'll that are saying rogues are OP are just being killed by myself and a couple others in the bracket who have put in 50 times as much effort and time into gearing up. It's not a class issue, it's an out-twinked issue in that case.