The fact that the map is official doesn't yet make it good. I actually hate both ctf3 and 5, but i like ctf2 and 4. ctf3 is especially bad for the reasonn that the whole base is lower than the only exit. Respawning def just block you from the top and makes leaving a really hard task.
Yes, defenders will lock them very often, cause good tema will always put one defender near the flag, and he won't miss an opportunity to make an easy kill.
I'm too lazy to show that places on your screenshots, but i can tell you: both ways to leave the base to the middle gonna slow you down without using rocketjumps. Empty place gives you no possibilities to dodge, so you have two ways: lose the speed, fall on the ground and become able to dodge, or don't lose it and become an easy target. I'm sure people gonna choose first.
Stay wild