The West London outfit are expected to drift into the Championship as they sit 10 points away from safety with just four games left to play.
Before replacing Mark Hughes at Loftus Road, Redknapp was close to making a big-money move to the Ukraine national team.
"I have [no regrets] whatsoever," ESPN quotes Redknapp as saying. "I think if you come and work for good people, you enjoy coming to work every day. I think it's unfortunate.
"If we were getting smashed every week and done awful, I'd be the first to hold my hand up, but we've just been short in one or two key positions."
The R's are preparing to take on fellow struggling outfit Reading this Sunday.