The movie is crowded with universes and heros from individual universes. Very little time is given for building up the universes or its characters for the audience to build any empathy. Wanda's character seems bipolar, there is no other explanation to how she makes the most crucial decision at the climax.

Another movie with a ton of characters was Spiderman No Way Home. It was beautifully executed and you rooted for every character in it, both good and evil. Dr Strange somehow lacked that.

There are reviews saying this movie was dark, I do not agree. The fights were mostly magical disks and lights thrown around and some fell dead when it hit them. There are some exceptions, but nothing like DC's suicide squad or Peacemaker. I think Marvel could have done much better.