How do you want to play CTF when one team has both flags? ^.^
Check the second argument of the flags and the CTF spawns around.

This map isn't too large and not suitable for more than 8 players as you've mentioned. And it's very narrow. I wonder how it's gameplay is like, can't imagine right.

The lighting is good, and the map itself looks good overall, except some parts, e.g. the room with the yellow armour. The wall texture looks strange due to the many repeats on the wall itself, and those standard-grass-texture and the wooden texture of the stairs don't fit there, imo.

Overall, it's 3/5 for me.

What's wrong on this map?