Redknapp replaced Mark Hughes at Loftus Road in November with the club rock bottom of the table and with just four points to their name.
The former Tottenham boss could not save Rangers, who drew 0-0 at Reading yesterday meaning both clubs have been relegated to the npower Championship.
Despite bringing in expensive signings Loic Remy and Christopher Samba in January Redknapp felt he would have had a better chance at achieving survival if he had been able to shape the club in his own fashion
"If you had the job at the start of the year it would have been different because you build your team and that is your team," he said.
"You shouldn't be running around in the transfer window trying to patch a team up, it is very difficult then. I spent days and days away from home all over Europe trying to plug some holes.
"You build your team in the summer, that is when you build a team, do your training and get together. The club went 13 games without winning a game and that is quite a bad start by anyone's standards."
- Sports & Recreation
- Loic Remy
- Christopher Samba