Barcelona has 1 match in hand that could make it create a higher points gap than Athletic Bilbao. Barcelona will not be eliminated easily from its current position because Bilbao is not as good as you imagine.
Barcelona won't be bad forever and I'm sure they won't let more points drop. The match against Osasuna is an important match to win after the defeat against Villareal, so don't just say the bad side without considering the good possibilities. Bilbao and Real Sociedad are not better than Barcelona, but I see some people would rather Barcelona lose than return to their best.
Barcelona will bounce back to good form, just a matter of time. Barcelona terrible form would be temporary because the coach is working efficiently on welcoming new development. Barcelona vs Osasuna will be classified as less free game for the home team. We know the team is having one of the challenging moments this season but it doesn’t mean we should also underrate their performance against their opponents, there are matches that are meant for Barcelona to win and there are some that doesn't deserve a slight chance of winning.