This is something that shouldn't happen but does, and will continue to do so here and at other similar sized clubs.
A manager needs a striker. Has a straight choice between a seasoned player with a reasonable goal scoring record and a younger as yet unproven lad with all the potential to score at a considerably higher rate. We all know the manager will sign the former. He needs an instant return to keep himself in a job. Similar with other positions. Building a better squad for subsequent seasons would be a noble cause, but he'd likely be doing all that for his successor.
It's ironic then that as often as not a club will appoint a manager purely on the grounds of perceived potential. A complete novice to management. With Britton/Whyte, McNamara, Archibald & Doolan we're no stranger to that policy. You can argue (probably correctly) that Doolan has had enough time to get things right. He's no longer a novice. But you can also argue along the lines that if take a worker off the shop floor and stick him with no training straight into management then his chances of success are remote.
I'm not sure what the answer is. There's certainly not many experienced managers (available) doing the rounds with a successful track record. I'm sure Brian Graham would get the squad fired up and maybe in the short term get results. That'll be good enough to get him the gig full time. After that, who knows. Just the way it seems to go.