Not exactly. OP_RETURN was never designed to actually *prevent* UTXO bloat... instead it provided an alternative that was at least financially neutral - if not cheaper - thus, successfully incentiivsing against UTXO bloat; making preventing it unnecessary.

Since then, that financial incentive has all but been completely destroyed by segwit & taproot. It's true that it's impossible to stop data being embedded on Bitcoin; but, it's pure hopium to expect most rationally self-interested people to choose to pay more to use OP_RETURN in order to avoid causing UTXO bloat. The more rational expectation is that the people who never would have gone through the trouble of constructing complex UTXO bloating transactions in the first place will soon have much easier to use arbitrary data storage available for them to bid on against the more conventional transactions' use of blockspace.