Objectivity they're not. They made several times their budget from box office alone so tyey eithermade a good amount of profitfor the higher performing ones or were around breaking even for the lower performers. The DnD movie will only make around it's budget or a little bit more at the box office, which means it's theatrical run is going to lose money.
Now if you said you feel they're bad films I would agree, I gave up on them after the third. I have heard Bumblebee is better but haven't watched it.