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.