Let's look at his jobs:
Bristol Rovers - play offs, mid table, sacked. FAIL
QPR - relegated, promoted, mid table, sacked. EVENS
Plymouth - quit to go to Leicester and later admitted to being dishonest - FAIL
Leicester - relegated, sacked - FAIL
Blackpool - promoted, relegated, play offs, left. - SUCCESS
Crystal Palace - promoted, left. EVENS
To qualify the last one, he signed so many players in the summer and made a right mess of things and then resigned as he couldn't handle it. Hardly an overall success.
So, one success out of six.
Amazing that some fans want this man at our club.