The entire Gulf War was only six weeks long.
It's difficult to compare; but Iran today is not Iraq then. F-15s are now based on a design that's 30 years older. Shoulder launched SAMs have moved on.
I'm not sure what happened here, but in the Gulf War, there was a move to medium altitudes after a dodgy first night and I've seen some footage that, if accurate and if I'm not getting it wrong, suggests there are different tactics going on here.