2019 - McAvoys trilogy of disappointments
each highly anticipated after the previous films (It2 and Glass) and a moderately anticipated (XM Dark Phoenix)..
then each underperforming at the box office and critically: It2 was expected to at least match It1(the 3hr runtime was obviously an issue but then that didn't hinder Endgame), and Glass was expected to do better as was also the long awaited sequel to Unbreakable, whereas Dark Phoenix flat out bombed despite Logan giving the XMen brand abit of a boost(but not unexpected after Apocalypse/being an X3 remake )
Of course the general WOM probably hindered the 3 films (all not great)