Wolves signed six players - Fer Lopez, Jhon Arias, Tolu Arokodare, David Moller Wolfe, Jackson Tchatchoua and Ladislav Krejci - without Premier League experience over the summer.
"The players who were brought in were brought in for the right reasons, but when you have a return of two points at this stage you have to say it's wrong because whatever starting XI we have put out has not been good enough," said Jackson on <i>BBC Radio WM</i>.
"We have a great belief in those players developing. The ability and will to improve has been excellent - but you want immediate returns.
"For the way we can go into the market for our players, it's tough. We don't have endless resources so we are trying to find players in markets where others aren't necessarily looking."