Any guy that will bite the head off a lizard and eat it is fine in my book. Sure, you have to be stupid to realize that some of the things he does are over the top and not good ideas if you're just trying to keep alive, but for the most part it's good entertainment, and the advice is sound. The guy is ex British special forces, so he does have the survival qualifications to be putting a show on like this.
Usually he'll let you know that you should try to find another way around, or up, but in the case that those options don't exist, here's how you forge a river, get down stream, climb a sandstone cliff, ect. Most people should just find another way, can't see a overweight US Male trying to climb down a Sahara sandstone cliff! (now that's entertainment).
I really don't think the stuff he does is too over the top, and come on, it's reality TV. If you think it's 100% real, and he should get no help from the crew, you are a fool. Its entertainment, with some helpful tips that might just help you if you find yourself in a dire situation, not non-fiction.
What I do think is over the top is how he has to comment on just how bad some of the meals he finds are, with the same grimace every episode. Ok, I get it, raw wild food usually sucks, stop over reacting and down it you fanny.