It was too all over the place. Forced Cameos from what if...? Powerful characters that died very quickly and too easily. It completely ignored Spider-Man no way home and Loki, even though it seemed like they should have been the reason why the Multiverse was breaking (which wasn't the plot at all.) Doctor strange was a side character to his own movie. Predictable ending.
I love Marvel movies because no matter what happens, there's always hope. This movie did not have that.