The visitors were unable to make it five games unbeaten as the Chiefs stormed to a 33-9 victory at Sandy Park in the Aviva Premiership.
The Warriors trailed 19-0 at one stage, and Hill is adamant that his side were punished for silly mistakes against a skilful Exeter team.
"It was difficult to put your finger on exactly what was going wrong but it was across the board with a lot of inaccuracies. We had a very poor start, which puts you on the back foot," said Hill.
"You can't come back here after being 19-0 down at one stage. Exeter, as usual, were pretty accurate because their skills are good. They very rarely make any mistakes and they put pressure on you because of that.
"But we were making too many errors, drop passes, lost the breakdown battle and couldn't get our drive going."
Worcester host Scarlets in the LV= Cup on Saturday.