Flat Earth theory as faulty with anomalies, and incorrect. As you mentioned with the 'hallway' things get smaller with distance. With Flat Earth theory the Sun (and Moon) should get smaller and smaller till it vanishes in the distance. The Sun doesn't; it disappears below the horizon at the same size it was when directly overhead. That's only possible with a spherical Earth. And, if the Moon and "Sun were the same size the Moon would appear much larger than the Sun during a solar eclipse and would block out the solar corona; that doesn't happen because the Sun is tremendously larger than the Moon and tremendously farther from Earth than the moon and only appears the same size due to perspective. Try to objectively analyze real data and concrete scientific and mathematical evidence for a spherical Earth at some point and you might learn something.
That's straight bullshit, sometimes it's much larger at sunset than when it's overhead. The atmosphere magnifies the Sun and Moon near the horizon.
Also perspective proves the earth is flat, you can see the Sun shrinking before disappearing past the vanishing point if you're at a high enough altitude to minimize atmospheric distortion and significantly increase the distance to the horizon.
The sun isn't actually larger at the horizon. It's angular size doesn't change, your brain just thinks it does because it's near the horizon instead of overhead. Taking measurements of the sun's angular size will confirm that the angular size is the same on the horizon vs. overhead, despite that it "looks" bigger when it's near the horizon. Atmosphere doesn't have anything to do with this. Ironically, this means it's a trick of perspective. Go figure.