I know exactly what you mean having struggled with this myself!
As others have already suggested it's not always about needing magnification but knowing what you're actually looking for. Most people will look for a person shaped thing to identify as a person. In woodland games you need to look for movement, colours that don't quite match up with the surroundings, strangely angular things in a natural environment. Now, a magnified optic may help you learn what you're looking for by making it a bit easier to see, but building up situational awareness and knowing what to look for is something that just has to be learned over time.