I've noticed a trend recently. Some pilots have failed to add full power, pitch for Vy and clean up the airplane after determining a go-around or missed approach was required. A couple of examples. One pilot on his BFR decided to go-around from a short field landing attempt. The first thing he did was to raise the flaps at a slow airspeed. Not good.
A second pilot wanted to shoot a missed approach from an ILS which called for a climbing right turn. This pilot added partial power raised the flaps and gear while cruising down the full length of the 5000 foot runway. He started a shallow climb around 300 FPM. ATC wasn't to happy with his missed because he didn't follow procedure. I wasn't happy either.......for several reasons. One, Didn't added full (or climb) power. Two, Didn't pitch for Vy. Three, Didn't follow the IAP procedures. Four, Put himself in a dangerous position of not meeting the required climb gradient.
Those two examples are from fixed wing pilots but I have seen the same type of issues with Helicopter Pilots as well. The main problem has been the failure to add climb power and pitch for the desired climb airspeed.
The idea is to get away from the ground as safely as possible. Power up, Pitch up, Clean up!