He could have just as well just walk into there and let himself get captured.
if he had done there barry and cisco would just be outside his cage repeatedly going.
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
"what is your plan."
"why did you let us capture you"
until the end of time because they would never remotely believe he wasn't plotting something. Even without the back up they had figure out he was charging himself, he could have easily faked his speed running a muck in a 1 on 1 battle and made barry think he managed to get lucky and beat him. The back up just let him put on a better show.
As I said it really doesn't matter if he threw it or not in the grand scheme of things, but I choose to believe he threw it because other wise it was a very poorly done fight with a lot of logistic problems, where if he threw it they all went away because he chose for a number of the logistic issues to happen to him.
To be fair to some degree I am not even convinced that arrow and flash are actually in the same universe. I feel like they are in universes similar to each other, but the arrow that shows up in flash is clearly not the arrow from arrow. The arrow in flash is intelligent, plans ahead and feels experienced. While the arrow from Arrow rarely ever has a plan and usually is just a shoot first and if I miss run after them and try to make up for things kind of guy. Plus the entire cast of Arrow just are happier in the flash, a clear sign they are from a different universe than the arrow currently is in