I'm really not sure what you're trying to say here. No one's calling Ting-Lu or Clodsire a hindrance to tesmbuilding, they are great mons. But they shouldn't be some of the only consistent answers to Espathra on a short list of mons that can even somewhat handle it. Even in games with supposed checks, it can still win. For example, in
elodin vs Ruft, on turn 12, Garganacl was pressured into recovering by Roaring Moon, which gave a free switch to Espathra, which proceeded to sub and boost. Ruft switches to Skeledirge after a couple turns, a decent check to Espathra normally as it ignores calm mind boosts and can threaten even a subbed bird with Torch Song which will eventually KO it. But Espathra muscles through anyways and proceeds to sweep despite Clodsire also existing, and supposedly checking it as well.
How about
Chef Tribal vs Ima? Ima's opponent brought trickscarf Gholdengo and Kingambit, two mons that can semi check Espathra situationally. Chef Tribal first broke Espathra's sub passed from Orthworm with nasty plot boosted Discharge, which could also cripple the bird's speed (it didn't), even terastilizing steel to tank Stored Power to try and threaten it, and Espathra's stored Power wasn't breaking 50% against Steel Washtom. But then Ima teras Espathra into fighting and KOs Wash. Chef Tribal brings out trickscarf Gholdengo, which could cripple Espathra. But Espathra uses substitute, blocks trick and forces Chef to switch back and forth between Kingambit and Gholdengo, in an attempt to PP stall it. Eventually failing and losing after Gambit falls.
Of course the example Duck Chris brought with
Savouras vs TPP, which is arguably the most egregious example yet. I kind of have to take issue with something you said especially,
Here, you almost seem to dismiss Espathra's impact and attribute the win to Iron Valiant, despite the fact that, as Duck Chris pointed out, Espathra effectively removed both fairy resists back to back by KOing Gholdengo and forcing Clod to tera so it wouldn't sweep. This just made Clod unable to check what it was originally put on a team to check (fairies), effectively making it worse in that context (Also regarding usage and win/loss, some of the games where it was on a losing teams Espathra wasn't even sent out, so that doesn't exactly reflect on it).
Espathra doesn't have to always sweep to be considered ridiculous. The effect it places on building, just for fear of it appearing is ridiculous. This Pokemon has flown under the radar because there was a mistaken belief that Cyclizar's exit would reign it in, but we've seen multiple examples of this not being the case. It's since risen to OU by usage, after
failing to do so during the months when it was first being argued as broken. Its presence is negative for the tier, and I hope more people start to talk about it.