Pioli lasted only seven months after replacing Frank de Boer in November and is the timing of the firing that appears to bother Simeone the most.
“It doesn’t seem like a good idea at all. Kicking out a Coach with three games left shows a lack of respect,” Simoni told reporters.
“In football these things happen, it even happened to me a couple of times, to get fired when the decision had nothing to do with the football aspect.
“It’s a horrible situation to be in, because the performances under Pioli were inconsistent, but he had a very good start. These five or six defeats in a row ruined everything.”
Primavera youth team boss Stefano Vecchi will take over for the remaining three rounds of the season.
Simoni was asked about the rumour Inter are going for current Barcelona Coach Luis Enrique.
“He was already at Roma and the final season at Barcelona didn’t go well either. I remember him at Roma, he had huge problems and didn’t get success at all.
“It’s true Walter Sabatini has a good rapport with him, but I’d go for a different Coach, probably an Italian one.”