Arch Manning booed by own fans as he admits he has to improve after another limp showing

Here is a 190-word summary of the key points from the news article: Quarterback Arch Manning, part of the famous Manning football family, has faced intense scrutiny while struggling to live up to high preseason expectations at the University of Texas. In the Longhorns' latest unconvincing 27-10 win over UTEP, Manning was booed by his own fans after another unimpressive performance. The 21-year-old Manning, who was an early Heisman Trophy favorite and led a then-top ranked Texas team, has played well below expectations so far this season. He was just 11-of-25 passing for 114 yards and a touchdown against UTEP, with a string of poor throws and an interception in the end zone. This comes after Manning struggled in a season-opening road loss to Ohio State, sparking questions about whether he was overrated and anointed too soon as the next big thing in college football. Saturday's poor outing will only increase the intense scrutiny and criticism surrounding the young quarterback, who has admitted he needs to play better than he has so far.