Movie hasn't released yet lol 😂. Even if it does release 3D might be bad but it's not like you have to watch it in 3D. I mean avatar is an exception not a general thumb rule that you should watch movies in 3D.
Hey you are not the first one and you definitely won't be last. It's not about you but what general people expecting going to watch it. And they will even if you don't.
As for entertaining movies after Shang Chi there was NWH, DS, WF (although what you find entertaining might differ so can't help there)
Why are you acting like this is anything new lol? It has been going for more than 10 years. People don't go to watch MCU movies expecting avatar level visuals. It's for the story narrative, character interaction, crossovers among other things.
I mean evryone knows avatar 2 has better VFX because Cameron spent more than 13 years for this. Experience or not theatres love money and antman will bring in more. You are not going to watch antman expecting it will have better vfx. You are going for the story , the greater narrative and what it will lead to for future.