Hwang Hee-Chan and Rodrigo Gomes struck the goals for Wolves, which were beaten at Molineaux leaving Pereira unimpressed.
The Portuguese said afterwards: “To be honest, I was expecting more from my team. I didn’t like the way we started the game because we tried to speak a lot about the start of the game, to start strong, to give a signal to put energy, to try to play in the offensive midfield, even though we know they will come to press. But in the end, we played the first minutes in our midfield and they finished this moment with a goal. We cannot start like this again.
“After, we cannot commit mistakes, we cannot offer goals like we are doing in this moment of the season, not only in this game but in the previous games. We are there and in one second, we commit a mistake and they score. We managed to equalise the game and after, another situation, another bad decision, and they score a second goal.
“Second half, another bad decision, playing in the middle under pressure, they score one goal and it was cancelled. After this, another mistake, playing again with a bad pass, with a risky pass and we concede a third goal. After with the subs, I think we reacted and I see a reaction from my team and we scored the second goal, but it was not possible to score the third.
“We must be better, not only tactically, but technically and mentally stronger.”
On Wolves' goals, Pereira also said: “The first goal is the way that we must play in this moment. Winning the space, a good cross into the box and scoring. Against this team, if we try to play with the plan that we had for the match, then we’d have had more chances to score.
“But in the end, the goals we conceded, mentally we suffered, and I saw my team suffering during the game, facing a strong team, and stronger than last season, this is a different Everton team, but talking about us, we need to improve.
“We need to stabilise our mental approach in the games and we need good results to be more confident. After the last game, I expected more. Honestly, I expected more from my team. But now we need to work, finish the market and try to improve.”