It isnae really.
For all that I think the Lip talks a load of pish most of the time, he is still entitled to have an opinion on our manager, regardless of how long he has held the position. To counter this by saying 'who would you have instead' isnae really a great argument.
If one of my employees were making a harry hunt of themselves, I wouldnt be keeping them on just because there wasnt an obvious candidate to takeover.