If people do not get told something is shit how will they know? whether it is shit does not really matter, because those who know it is not will do their thing to keep it not being so and at the very least be the exception. I don't think it is so bad, but ideally, it should be a bit of both when talking about these things. Sure you can like it but you must also admit to the failures. Someone that only sells you the shit part therefor is doing so to cover-up their own failure.