I mean, it always looks ugly with OBJ but this is simply not true. He has a career pass block win rate around 90%, which is top 10 since he's been in the league. Even with his early struggles as he adjusted to a new system and has been working new techniques, he's right up there this year. Sure he'll give one up here and there (most tackles do, even great ones) but for the most part, since the first quarter of the season he's been good to great in most games.
Again it may look ugly but there's no question it's effective. If you isolate on him in coaches tape he wins on the regular. Once he gets his hands on a guy the rep is essentially over.