I'll keep it simple. This movie was terrible. It was filled to the brim with every flavor of bad movie trope you could possibly think of. The only respite you'll get from the awkwardness comes in the form of characters who are either busy solving their problems in the most complicated way possible or contradicting themselves.
Examples:
In the infinite multiverse you would think that Wanda could collaborate with America to find a world where her kids and even Vision are alive but she is not and she could just go there. (The sickness excuse was weak justification for needing the power herself.) A simple enough solution because all America needed to control her powers was the magic of someone else telling her to believe in herself.
Wong willingly tells wanda about the secret temple with all the spells she needs to take over every universe because she was hurting four random sorcerers. (Glad cow man is alive though. Thats the backstory I actually want.) He is even polite enough to give her an unprompted history lesson while at the temple.
He later tells Dr. Strange to kill a child because it's "the only way" to prevent her from taking over every universe.
There are obvious plot holes, poorly done CGI scenes, inconsistent characters, and a campy script to top it all off.