I would be hesitant to jump to such conclusions. They have succesfully kept their F-14s flying despite sanctions and have produced their own indigenous fighter based on the F-5.
Their orbat contains over 300 F-14s, F-4s, F-5s, Su-24s, Mig-27s, MiG-29s, Mirage F-1s and Chinese J-6 and J-7s.
Iran - Air Force ORBAT