"We're trying to get them to understand and we're putting them in situations they're not often familiar with.
"They turn around and look around and say: 'where's Jerry Collins, Marty Holah?' or 'where's David Lyons or Xavier Rush?'
"They haven't got those players here, or Ben Blair or Casey Laulala.
"For our players in terms of their overall management and leadership, it's quite difficult for them sometimes coming into this environment."
Wales full-back Lee Byrne agreed home-grown Ospreys players had learned from overseas team-mates like Marty Holah and Jerry Collins, but put Saturday's failure down to lack of time competing as a team.
"They [overseas players] are quality players. They haven't just come over here on the payroll, they have really stood up and we have learnt off them - we do look to them now and again," Byrne said.
"But we have got leaders in this [Wales] team as well" he added. "I think it [defeat to South Africa] was a bit of a lack of game time."
In a separate twist, Ospreys joint managing director Mike Cuddy said the restriction of having just six overseas players made it hard for the region to compete.
"We can't go out and sign two Argentinian props or a South African back row," said Cuddy after Tuesday's Heineken Cup draw which pits them against ex-winners Munster, London Irish and Toulon.
"We are allowed six players from overseas. It has its plus points and has its minus points.
"When you have a draw like this and you're already carrying five or six players, your recruitment is virtually done."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.