"How can you go any lower?" Williams asked after the game, according to The Charlotte Observer. "Be honest: How can it be any worse than it is right now?"
This is how far and how fast the defending national champions (13-8, 2-4 ACC) have plummeted: In the space of three weeks, they've fallen out of the Top 25, sunk to near the bottom of the conference standings and lost four of their last five -- including three of their last four at home.
Historically, the Heels have dominated at home. Entering Sunday night, Virginia had won only five times in 68 tries at Chapel Hill. But that was then, and this was Sunday: The Cavaliers reeled off an 18-0 run in the second half and throttled UNC 75-60, behind Sylven Landesberg's 29 points.
Sammy Zeglinski added 19 points, including a pair of 3-pointers that gave Virginia, which led 35-32 at halftime, a 21-point lead with 14:20 remaining. North Carolina shot 35.7 percent from the field, committed 17 turnovers and never led.
It was UNC's worst loss at home since an 81-66 loss to Maryland on Jan. 22, 2003. That team finished 16-14.
"We've got a lot of problems, and staying in front of the basketball has been one from Day 1 with this team," Williams said after Sunday's game as he teared up in frustration, according to The Observer. "And I really thought we could be a good defensive team, and we haven't shown that. Two or three games I thought we were really good defensively. Last game, I thought we were really good defensively ... but we're not really good defensively on a consistent basis."
The Tar Heels started the season 12-4, with a win over Michigan State and losses to Kentucky, Syracuse, Texas and Charleston. But they've gone 1-4 since a loss at Clemson on Jan. 13. A week ago, they fell out of the ESPN/USA Today coaches' Top 25 for the first time since January 2006.
UNC has 10 games left in the regular season, all in the ACC -- including two against archrival Duke (No. 9 ESPN/USA Today, No. 10 AP) -- and six of those games are on the road.
Meanwhile, Virginia (13-6, 4-2 ACC) is now tied with Maryland for second in the ACC. Duke leads the standings with one more conference win (16-3, 5-2).
"Ol' Roy's been awfully lucky in his entire life and things have been very smooth, but right now they're not," Williams said, according to the Winston-Salem Journal. "I've got to do a better job with my team than what I'm doing right now."