Crispin's viewpoint seems reasonable to me, and less extreme than it has been presented in the past. It's a worthwhile point and it doesn't ruin the movie to him, he seems like he still has respect for it despite his one objection. I do think having it be more about the love and family, without being so tied in with materialism (or using materialism as proxy) would be a bit stronger and more in line with the rest of the film. It's not a make or break kind of thing, in a movie series that is loaded to the teeth with product placement.

Plus, in 2+3 we see that Marty's downfall was his temper and recklessness. Although this gets him fired, the readout for his success wasn't necessarily wealth, but how disjointed his family was.

We don't (and probably won't) know how much of an ass Crispin was about this during filming. If he was trying to leverage a different ending to fit in what he thought was a better ending, he might have had valid points but it's obviously out of line for an actor to pull that. Especially late in the filming process. And we don't know if Gale's retaliation was as real or vile as Crispin leads us to believe.