Go arounds
The reason why Go arounds cause so many problems are many.
1. They are often unexpected. (Surprise effect)
2.Two and four engine GAs are not practised in the Sim (usually)
G/As in auto in the big Boeings is a doddle, in manual it's a different story!
3. It is at the end of a sortie so the aircraft is light and you are in manual Trigger theGo levers and what happens next: TOGA the aircraft is off like a startled bunny. If the GA altitude is low then the potential for a LL alt CAP in Boeing speak is high. Both crew members have to work to get the A/C correctly configured, unless PF disconnects the auto throttle and reduces power the potential for an over speed or alt bust is very high. ( See 4 below)
4. Trying to sort out the automatics frequently causes heads down. Hopefully not from both though! From experience The children of the magenta line do have problems.
Much better IM (old fashioned) opinion . Fly the aircraft in manual. Do what you get paid for!