I think both sides are wrong, walkthrus are really helpful in many cases, so long as you use them properly. Following out of date walkthrus verbatim, choice by choice is a really bad habit, but playing the games, and referring to walkthrus when you encounter problems, can be a real lifesaver but again, using them as a reference guide to look up things, I've found makes them work great, even with this game.
I had my share of issues too, but one quick readup, and i found where i went wrong and was able to go on every time.