I'm a wind main, I had trouble vs Earth main before I got GNW Knakuro. Since I got it thou, I win the fights that I should (i.e. not vs the heavy ptws, in those cases it hardly matter what element they are)

HOWEVER, it takes far too long. This doesn't matter elsewhere, but in sage, earth is cancer. It's the worst matchup one can get other than the heavy ptws who will pummel you into a puddle with a hand tied behind their back. Anyone even remotely close to your level and power will take 5+ round to kill, slowly.
I would be much happier if Earth was adjusted, not nerfed, adjusted, so that the fight goes faster somehow. However, grindy is also kind of earth's "thing" and if we take it away, it's not as distinct anymore.

That said, lightning is a relatively bad match up against earth and thus will perceive earth to be more OP than they are. Fire counters earth because they all have ignite, almost every wind is using GNW Kankuro. Water is relatively weak against earth but they usually carry poison and have a good chance of acupuncture the Earth. Lightning is op when they can kill stuff, effective versus clones mostly and more fragile target, earth isn't really that. At best, lightning might have a good time killing kabuto clones as some earth do carry him, but that's about it. Most lightning combo simply don't have enough DoT/stuns to reach around Earth's shield and/or prevent it. It's a soft counter really.

I honestly don't mind the fact that fire can clear my(me being wind) clones, because that feels "normal". What I have a hard time accepting is that a fire of similar strength can actually one-chain-kill one of my characters*. So should they somehow stun my first-action char (usually through main mystery, as before they dish out AoE, the clones do prevent regular controls) or their first-action have higher init than mine, the fight is over before I can actually do anything. Granted, this probably have as much to do with tobi as fire main itself, probably why rumor is circulating about its going to be nerfed, but that chase damage... dang...

My only beef with earth is in sage.... win or lose, the fight takes too long. It's bad for them too, hard to do well when all your fight take longer than others. Feels kinda like a psychopath, "I'm gonna fail and I will make you all fail with me"

*No, I'm not using wind dance nor am I piling all defense on main like many noobs do. In fact, the prime target they burst down is my healer(pain jigokudo) which have full lv 5 life/res/def magatamas, maxed sage tier equipment, full defensive, average lv3-4 purple chakra rune with +41% life mood.... (I pile defense on it for obvious reasons...)

But it is annoying as heck in sage.
Which is why I maintain that while fire is the most OP class, earth is the most annoying.