That's not Anwar's little game: by referring to two films which performed poorly at the box office, but were reassessed as classics once in the ancillary market (at the time, cable and home video), he's attempting to make the highly false equivalency argument that Quantumania and The Marvels are of the same class and are viewed at a similar level of consideration. Obviously, that is not the case, and its quite the absurd game, since he has not in any way demonstrated that his argument has merit. Its simply trying to wish it into existence.
One would guess that the films in question do not even rate high within their own series let alone as single movies. The MCU had bad movies which bombed. That is a fact that should not be s difficult to accept. Many film series throughout film history had bad bombs among their number, yet no one is casting spells trying to defend every entry as some quality production or classic, because to do so is living in denial about the nature of any continuing series: eventually, some bad writing, directing, budget issues, mismanagement from on high, or failing to read the room about what is appealing to audiences, etc. (or any combination of this list) will lead to a bad film. It happens, whether it is the debated MCU films,or DC, Star Trek, and other series, but a certain someone has to defend the MCU to ridiculous degrees, as seen in this recent discussion.