If last weekend's defeat at home by the Seagulls served as a warning for Manchester United and their new manager, then Saturday's loss at the Bees will have sent alarm bells ringing.
The Red Devil's first away game of the season ended in a heavy defeat, leaving them without a point and searching for answers.
Sky Sports pundit Karen Carney said the situation "can't get any lower" for Ten Hag and his players and Gary Neville said the club's owners are overseeing a "collective rot".
Alan Shearer said that it was an absolute mess. There were years of mismanagement. The recruitment has been bad because of a lack of leadership.
It will take a lot of time and money to get things right. They are far away from where they would like to be.
How bad is the situation at the stadium? A closer look is taken by the British Broadcasting Corporation.

If the travelling fans were hoping for a fast start from their team, they were disappointed.
After just 10 minutes in west London, Josh Dasilva's long-range shot somehow squirmed underneath goalkeeper David de Gea, and eight minutes later Mathias Jensen capitalised on De Gea's poor pass to double the Bees' lead.
After just 35 minutes, Bryan Mbeumo latched onto a long ball and gave the hosts a four goal lead.
At the end of the show, the Sky Sports pundit and former captain said "we are witnessing the destruction of Manchester United".
I thought United would do better but they have been messed about and there is nowhere to hide.
I've been watching United for 42 years and I can't think of a time when things have been worse.
This is the first time in the history of the league that United have started with back-to-back losses and gone on to win.
Ten Hag became the first manager since John Chapman in 1921 to lose his first two games in charge of the club, according to the statistics.
This is the first time in 76 years that the Red Devil have suffered seven straight league defeats on the road.
Since the beginning of the season, United have conceded four goals. They have allowed four first-half goals in the last year.
This is the biggest top-flight win for the Bees since they beat Grimsby Town 6-1.
They must be licking their lips when they go to Old United next week.
The owners of the club.
There have been protests against the Glazer family's ownership of the Old United side in recent years, one of which resulted in the postponement of the Reds match against the Red Devil.
The American family who have owned the club since 2005 have been the subject of protests by United fans.
Fans of the team are calling for a boycott of the game next week.
The man has to get on the plane tomorrow. He needs to get over to Manchester and start to divert the issues away from the club and let everyone know what his plan is with the club.
The owner of a failing business is the one who is to blame. It isn't doing well.
"They took £24m out of the club two months ago, now they have a decaying stadium that is second rate, when it was one of the best stadiums in the country a decade ago."
You have a football project where they don't know anything. There are big things that need to be fixed, but you can look at the players.
They have to look at the music. The club isn't good.
In the wake of Saturday's defeat, the club's Supporters' Trust issued a statement that said the result felt like the culmination of a long-term direction of travel.
"Tonight is an embarrassment for Manchester United fans," it said. It wasn't a surprise.
After the full-time whistle, Ten Hag admitted that United needed quality players, but who would join them?
Frenkie de Jong is unwilling to leave Barcelona because of a contractual disagreement, which appears to be stalling United's move for the Dutch international.
The club's spending since their last trophy is about £672m and they have already spent over $60m on three new players.
A combination of the Italian club's transfer fee demands and the negative reaction from United fans led to the end of the club's interest in the Bologna forward.
Negotiations are said to be at an advanced stage with the player.
They are not helping themselves, according to a French journalist on a radio show.
Since Sir Alex Ferguson left, the lack of a transfer strategy is baffling.
"How many more times will Man United managers lose their jobs because of these players?" asked the former United player.
Over the last decade, the recruitment has not been up to par. They have signed a number of centre forwards. They are linked with Marko Arnautovich. Where is the process for hiring people?
The bright green kit is the face of every Man United fan. We're sick to our stomachs.
IfBrighton andBrentford can take Manchester United to the cleaners, what will other teams do to this team? It was completely ignorant. The United are going to be in danger of being demoted by the end of the year.
Most of the Man United players will have plenty of time to shop for Christmas. None of them will be in the country.
Frenkie's chances of signing for United went from zero to zero.
Man U will have their first points before the World Cup.
The Man Utd fans are crying. When the club goes through a bad patch, they turn into a loud band. Is that a real fan? The hunters were glory hunters.
