The Second Answer: Run More Interaction

The second answer is better deckbuilding.

A lot of EDH decks are built to maximize cool plays, big haymakers, and synergy pieces. That is part of what makes the format fun. But it also means many players shave removal or flexible answers because they would rather include one more flashy card. Then when Rhystic Study sticks on the battlefield for multiple turns, it suddenly feels overwhelming.

But enchantments are not some impossible card type to answer. If your deck regularly folds to value engines like Rhystic Study, then that often says as much about your interaction package as it does about the card itself.

In my view, Rhystic Study often exposes weak deckbuilding more than it exposes a broken format problem. If your meta contains strong enchantments and value engines, your deck should be built with that in mind.

The Third Answer: Play It Yourself

This may not be the most popular argument, but it is still a fair one: if Rhystic Study is that good in your meta, you can also choose to run it yourself.

That is not a lazy answer. Commander has always been a format where adaptation matters. Not every strong staple needs to be removed from the format just because it is powerful or because many players find it irritating. Sometimes the correct response is to acknowledge that a card is part of the environment and build accordingly.

If a playgroup consistently refuses to pay the extra mana, refuses to run enough enchantment removal, and then complains that Rhystic Study takes over games, that does not automatically mean the card is unhealthy. It may simply mean the group has chosen not to adapt.