The answer to this is play better, more entertaining football than Puel's team has, particularly at home. TBH I doubt there would be any question of him losing his job, or that many fans calling for his head, if he had achieved exactly what he has this season but done it playing more entertaining football involving more goals and no runs of 4 home games in a row without a single goal being scored (FFS).
I agree he has been dealt a bad hand for all the reasons stated numerous times on this forum but I have never been so bored watching us on such a relentless consistent basis. Part of me thinks give him a chance to prove himself next season, with some of his own signings and no European handicap, but the greater part can't help thinking that we will just get more of the same.
IF he has fallen out with senior players/lost the dressing room on top of/because of the soporific style of play then he has to go regardless.