I fail to see how giving honest critics of admins has anything to do with me knowing the rules, actually quite the opposite. By knowing the rules very well I can recognize which admins choose to look the other way. I know the rules very well and I uphold & defend them, everyone knows I'm a teamplayer (which is why I got banned, I was helping defend my team and was HONEST). I report offenders on a regular basis, especially on siege where team play matters alot more. This wouldn't have to be the case if admin was given to clans that actually play there.
In your case, your critiques of admins definitely show that you have an understanding of how the rules work, being that you give legitimate complaints, rather than "said admin is a fucking douchebag",etc. You've played in both the community servers and the official servers long enough to have a great understanding of what is right and what is wrong.
You're a pretty honest player, and I can understand your frustration, as no admins really do play on siege, and for the most part, you do uphold the rules, however, you know that one of the most obvious things for an admin to see is a blatant TK, which is usually what a retaliation TK turns out to be. I can't speak for earth, but I know most admins on here, myself included do our best to make sure griefers aren't around on the server ruining the game for others. Being that admins are getting accepted with little to any prejudice, i'd suggest you apply for admin on siege. I personally think you'd make for a good admin.