Financially trapped Derby County will play in the third division next season for the first time since 1986, after Queens Park Rangers defeat.
The downfall was as a result of Derby still in administration, having been placed there by Morris on 22 September.
“Hopefully he doesn’t have a good night’s sleep tonight and that plays on his mind,” Rooney told BBC Radio Derby.
“I think he needs to have a think about it.
“Where the club’s been left, it was a complete mess. I know Mel Morris is a big Derby fan, so I’m sure he’s sat at home tonight disappointed.
“We are disappointed as we’ve done everything we can to try and not let this happen and worked extremely hard.”
Derby face 12-point deduction when they were placed into administration which dropped them from 12th to the foot of the table, with. Deficit of two points.
They were hit with a further nine-point deduction in November when they were still bottom of the division after admitting breaches of EFL accounting rules, which saw them slip to minus three points. BBC reported.
This deductions finally led the Rams to relegation.
“We’ve earned enough points to stay in this division next season and developed some really good, young, local players,” Rooney said.
“In that sense, the future of the club looks bright. But we need to get over what’s happened.
“It’s a sad day. I’m sad, disappointed, upset, frustrated, but proud.
“The effort the lads and the staff have put in to try and galvanise the squad and the club, it’s been a lot of work.”
