Who says Levy is as guilty, he signed players, who says he didn't want Harry to go out and grab a top quality striker and Harry thought some prem league striking experience would help them out instead so he thought Saha was a better option than someone else. Levy has spent loads of money never been scared to invest and ultimately, look at the first half of the season's form. Redknapp had a squad and didn't use it, he could have changed things up and didn't, he could have dropped those who didn't perform, and didn't, he could have done a great deal of different things and didn't.
The same team performed dramatically worse, the capability was there, the manager failed to extract it, simple as that.
You have to remember its not like Spurs were okay and Arsenal were out of this world amazing to close the gap, Spurs were terrible and Arsenal were only a little above average. Arsenal won 11 games in the first half of the season, before which Spurs were massively ahead, Arsenal won 10 games in the second half of the season........
The fact is one window is never at fault. Arsenal's squad is suffering because of mistakes made anything up to 5 years ago. Spur's season is based on squad decisions made in the past 5 years as well. Spending 12mil on Palacios, Crouch, Keane, and getting rid of them all, getting rid of Pav when he's a quality striker, turning Defoe into a bit part player for no reason. If he merely played Pav and Defoe more, they'd have done better. He could have bought a less mistake prone left back, or right back years ago. He could have bought better CB's, not played a crippled CB in important games who kept making mistakes. Bought in Kranjcar and Pienaar on high wages but barely used either. Chimbonda was clearly washed up, lazy, didn't care and Redknapp threw wages at him again. Couldn't get anything out of Taarbat or Boateng, got shot of an incredibly good Bent for no reason.
It's 99% his mismanagement of squads and insistance on buying players he'll never use for no apparent reason that has cost him. There are 5-6 players he's got shot of who could have made dramatic differences this season, 4-5 players he's bought for no reason what so ever and the fundamental fact that when the team stopped performing well he had no answer.
Spurs were not a relegation quality side, at all, suggesting so is beyond daft. At the start of that season they had Keane/Berbatov both leaving, neither playing well(or much ?) before they left, and the replacements, Modric and Pav were brand new to the country, not settled, and took a while to get into form, as did Pav. Had Ramos stayed there isn't ANY doubt they would have finished way above midtable, none at all.