Cool so you want me to just believe you that the curvature is there? You haven't seen the curvature during a total lunar eclipse you have only seen a shadow that's all.
You can believe or not believe whatever you want ultimately. All I can tell you is what is true. Or at least try and help you understand. I'm pretty fed up with non-globe believers thinking they know better than anyone else but without being able to present any compelling evidence to show that they are right and everyone else is wrong. If you are so convinced the Earth is flat then just explain to me in detail how equatorial mounts work well in both the northern and southern hemispheres.
So what is causing the obviously curved shadow that I see crossing the disk of the Moon during a total lunar eclipse? What phase is the Moon when there is a lunar eclipse and where does that place the Sun in the sky compared to the Moon? What direction does your shadow point compared to where the Sun is in the sky during the day?
And don't tell me it is caused by some sort of mysterious shadow object which no one has ever seen or detected in any form cos I ain't buying that. (unless you count the Earth itself of course).
Just forget about what you want to believe for a moment and consider instead only what the evidence is that is presented to you for a moment. What is the most simple and logical answer based on what you see?