I saw that after failing in the Champions League, Newcastle's condition was getting worse and it was very difficult for them to perform optimally to win the match. If you look at the number of players who have suffered injuries, it is true, as you said, that it is not surprising that Newcastle are again disappointing. If this does not change, Newcastle's condition will become even more difficult and it is possible that they will be further left behind at the bottom of the standings.
It is predictable because Newcastle United just have their first season in Champions League after some decades. They don't have experience to decentralize their resources for Premier League and Champions League. From coach, staffs to players, they all dont' have this experience and it's no surprise to see they tried hard in Champions League, failed there while they got some consequences for Premier League like low ranking and some player injuries.
Newcastle Unites was doing good job but suddenly as they have few injuries and suspension of the Tanoli this give them big shock with things are going from bad to worse for them in last few days, and they are dropping points frequently in early rounds they were right on their target and things were completely favourable but suddenly as fans were expecting they achieve more than expectations they lost their points and form which bring them down in Premier League and also having early exit from the Champions League.
Eddie Howe is currently under pressure with his job is also under threat even most chances Saudis will not take any quick decision and will wait for the end of this season with improvement option is still available, but now it's time for them to act quickly and create chances for their best result in coming matches even now challenges are tough but still achievable for them.