If you have issues running steel cased ammo your rifle isn't worth it's weight in scrap.
Ok that's an exaggeration but any AR worth a damn will run Steel case no problem.
Most will, but there's plenty of ARs that are otherwise decent that for some reason just don't like steel cases. If the only failing is that it won't run steel case, then that's not a bad AR, it's just an AR that doesn't like steel case ammo.
The quality control of steel ammo is not the same (some, like Hornady, is likely good, the Russian stuff is so-so on its best day), so failing to run the super cheap Russian steel ammo is hardly a statement as to the quality of the rifle. The Hornady steel stuff costs just as much as brass cased ammo, so I don't really see the point in messing with it.