Don’t lose your patience — even when they lose theirs
It’s easy to start snapping at someone who doesn’t seem to be trying. After all, it’s just one foot in front of the other — all it takes is mental resolve.
Only, it’s not so easy for everyone. Physical fitness, acclimatisation to altitude, experience and attitude all play a part. A moderate hike for you may be exceedingly difficult for someone else. Try to remain calm and positive. Encourage the weak hiker and don’t show that you’re bored or anxious even if you are. This will only demoralise them further.
If they lose their patience, don’t get defensive (“well, I didn’t ask you to come” or “most people can handle this”). They can be angry if they need to be angry but you should keep your cool.