Absolutely, every club experiences both good and bad times. Juventus has performed well from the start of the season, but we don't know what's going on with their performance right now. Juventus has competed with Inter Milan for the title this season. I believe it is too late to judge Juventus at this moment, with the games left, Juventus still has a chance to finish the season in the top four. Juventus' current players are capable of winning their remaining games. M.Allegri's goal at this moment is to win the rest of their games and finish in the top four, because they are currently two points ahead of Bologna.
Juventus needs to improve their squad in the next transfer window because if you look at it at the moment their squad is not strong enough to compete for the title. Indeed, their setback occurred in the second half of the season where they lost a lot of points which resulted in them losing hope of becoming champions this season. Juventus must get up to look for victory in the next match because their position in the standings is not very safe because Bologna is increasingly putting pressure on them in the standings.
If Allegri fails to bring Juventus to compete in the Champions League I think he will most likely be fired at the end of this season because this season Juventus only played in Serie A but Allegri failed to bring Juventus and that is a setback from his coaching method. They may have to do player recruitment where they need to look for attackers who are more productive in scoring goals and they also have to look for several new defenders to strengthen their defense line.