Okay let's look at her major on-screen battles then shall we?
Vs Random Trainer with Druddigon:
derp Attack, attack, attack....No. She correctly analyzed and evaluated Druddigon's strength after watching Tepig tackle it. She tells them to block Flamecharge ... which neither Druddigon or Emy known it could do. It was successful and damage was avoided. It was then their turn to attack and Druddigon allowed Tepig's puny embers to throw it off but Iris told them to press through it because she knew his dragon claw wouldn't have a problem getting through ember. Was she supposed to make this great big ol strong Druddigon dance around Tepig? Her game plan was basically "Block then attack with a close-up attack. Wait, they're trying to stop us from getting close with a weak attack like that? Deflect those attacks and close the gap so that you can finish this".
Derp Attack, attack attack, attack. There wasn't very much she could have done in that one, Excadrill was too outmatched. She even makes it a point to say that had they had an option for a ranged move they would have been able to come up with some more options in how to do things in that one. And that's proven later.
Derp attack, attack, attack, attack Hmm? Not only does she use Dig to dodge attacks, she used attacks to deflect attacks and even free Excadrill from being frozen.
*gasp stragety* Good that you could see that over all this BS I'm reading ...
Here, Ash actually used strategy, using spins to increase power of Iron Tail. What did Iris do the entire match? Lol, attack, attack, attack, attack.
Again, here Burgundy used strategy. Shooting water down the hole so Excadrill couldn't dig(and no, dig-a-hole is not a strategy). Also using the move Revenge as a strategy. Once again what did Iris do the entire match? Attack, attack, attack, attack. For both this and the Ash battle I think you're mistaking combos with just "attack attack attack". In the Ash battle Pikachu was clearly the defensive one and everyone could see it. The only thing Iris had to work around was Iron tail ... which she tied to do with Focus blast but that was being blocked by e-b. In the Burgundy fight she knew she was at a disadvantage and had to string together combos because she didn't have any effective moves to rely on. In that fight she has some very effective combos.
Attack, attack, attack, attack. What? She went for a Drill attack and that got shockingly countered. She then tries to go for the old "Dig to protect yourself from damage and do a sneak attack" move but that's stopped and Excadrill is comboed out.
So, yes I pay attention to her battles just fine. There's no real depth, or strategy in the way she battles. Or maybe you're bias?