Yet, it is. It's like your understanding doesn't matter.
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To be fair it was in the theaters much longer because it was getting watched over and over again much like Titanic did. Nowadays, most movies just have that one or 2 huge weekend then drop % by a HUGE margin.
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Endgame is, however judged based on the previous other movies. Simple fact of it being the climax of all of them instead of a stand alone.
Don't worry waffles, when hamster doesn't like something you say, she ALWAYS puts in her response that she's done "entertaining you". Even though she type a whole paragraph immediately after that statement.