I feel like we've seen a different movie. What was so crazy in the third act, not talking about the credits scenes? Hank went to the Quantum Realm just as we had expected, saves Janet just as expected. There was Sonny Burch trying to steal the lab, while Ant-Man and Wasp tried to retrieve it, but I didn't find any of that crazy.
I don't follow the The Winter Soldier to The First Avenger analogy either. I know, opinions and all that. But the first Ant-Man had a more cohesive script, it had payoff and it had emotional beats. It also had higher highs, and I would argue more creativity than Ant-Man and the Wasp. But I would have to rewatch Ant-Man to be sure of that.
I make a point out of not watching trailers whatsoever other than the first teaser, so I don't see Hank going to the Quantum Realm coming, neither I had a clear idea what was going on with Jan. I mean, that's not Marvel Comics Jan and the beginning of the first act sort of gives you an idea that Jan might not be exactly the same Jan that Hope and Hank love, so I enjoyed how they subvert the whole plot twist by being a twist itself, Jan saves the day with the rest of her family. Also, the way that the third act was shot and edited was very exciting to me, cutting from the craziest car chases in San Francisco to the Quantum Realm worked for me.
If there's ONE flaw I see in this film it's not how the film it's structured, I was way more engaged with the story of this film than I ever was for Ant-Man, but the ONE flaw is Ghost's reasonings for being a villain. Her visuals are amazing, it starts extremely strong but then she's all "no, I'll be evil, but not too much because redeemable evil so I can show up in the Thunderbolts". Other than that, I absolutely loved this film and I'll be watching again today.