As Ruben Amorim's issues worsen, a dejected Manchester United jeered off following Bournemouth's hammering.

Following a humiliating 3-0 home loss to an outstanding Bournemouth team that is now up to fifth in the Premier League rankings, Ruben Amorim's Manchester United faltered into Christmas.

Andoni Iraola's Cherries delivered the greatest blow of the Portuguese head coach's brief tenure by winning by the same score a year after they had won their first-ever match at Old Trafford.

After Antoine Semenyo's goal and Justin Kluivert's penalty sealed a thrilling victory that drew jeers from the home crowd at the end, Dean Huijsen became the most recent player to take advantage of United's shoddy set piece defense.

The outcome, which left the Red Devils stuck in 13th place over Christmas, represents a concerning decline in both performance and attitude following their 2-1 derby victory over Manchester City last Sunday.

Although United manager Amorim has always forewarned that there would be difficulties, this fourth loss in his ninth game as manager highlighted the problems even more.

As for Bournemouth, Iraola's team silenced Old Trafford for the second consecutive season, and cries about European trips filled the air.

After the dramatic Carabao Cup elimination against Tottenham, Amorim made six changes, and Marcus Rashford's absence from the squad for the third consecutive matchday had dominated the pre-match conversation.

Despite Kepa Arrizabalaga stopping an early snapshot on the livewire and the return of Amad Diallo to the starting lineup, Bournemouth appeared more composed and self-assured in the chilly weather.

Before an all too familiar hole in United's arsenal was revealed, Semenyo's strike directly at Andre Onana was the best the visitors could provide in the early going.

Tyrell Malacia was incensed as it was determined that he had fouled Adam Smith, and Huijsen easily defeated Joshua Zirkee to head home Ryan Christie's subsequent free kick in the 29th minute.

Soon after Evanilson's promising acrobatic try, there were moans, although United displayed glimmers of life prior to the break.

Before Huijsen twice threatened to undermine his good work, Bruno Fernandes barely missed a fantastic chance from a Diallo cutback.

First, Kobbie Mainoo cut off the defender's casual pass, breaking and playing in Fernandes to get away with a shot that Kepa made a good stop. The ball ultimately went out for a corner, and Diallo's corner was sent millimeters wide of his own goal by the blind Huijsen.

Mainoo made a valiant run before halftime, and Fernandes missed a long-range shot.

After a spectacular victory, Bournemouth moved up to fifth place in the standings.

After halftime, Amorim substituted Leny Yoro for Malacia and then made two further substitutions, replacing Zirkzee and Manuel Ugarte with Rasmus Hojlund and Alejandro Garnacho.

These adjustments were made right before a corner that led to defensive issues and necessitated a hack clear by Lewis Cook, Bournemouth's own halftime introduction.

After Noussair Mazraoui took down Kluivert in the box on minute sixty-one, the game would soon shift in favor of the visitors. The Netherlands international stepped up to send Onana the wrong way as he stroked home after referee Craig Pawson indicated to the spot right away.

Two minutes later, the situation worsened.

The ever-improving Semenyo drove home Dango Ouattara's cutback after Mainoo had a ball cut out and Bournemouth broke away for Evanilson to slip in. The cheering Cherries supporters yelled, "Man United, it's happened again," as the scoreboard flashed up 0-3.

Ruben Amorim was unable to prevent the United's demise.

Despite being shaken, Amorim's side made an effort to strike back. Hojlund sent Garnacho hurtling through, but Kepa was unable to stop the Denmark attacker with a brilliant stop.

As Old Trafford started to empty, Diallo blasted wide and Milos Kerkez came very close to scoring a fourth goal for Bournemouth.

In stoppage time, Yoro saw a shot blocked on the line, but it would have been little comfort as the United supporters who remained until the very end jeered the final whistle.