In defence of producers... Firstly, there are two types: "proper" and "wanabbees"
A "proper" producer is an organiser. Not only do they have to get the money together but organise a director, camera team, editor, cast etc. etc. etc. It is not an easy job. Each department will have the opinion that they are the most important and each dept will feel that their budget is too small. It's the producer's job to keep this bundle of egos in check. This ain't easy and sometimes crew think that the producer is being an asshole when, in fact, he or she is simply doing her job.
When it comes to television a producer is responsible for the production. Getting crew, booking flights, hotels, local fixers, making sure that it all comes together and that nothing is forgottten. They will also be responsible for filming permissions, arranging interviews, recces, carnets and insurances. They will need to rely on others to do their jobs efficiently and, if you don't, then the producer will crack the whip.
So, a proper producer isn't being an asshole, they're doing what they're supposed to. It is very, very rare that a "proper" film or television producer doesn't know what they're doing since they tend to get fired after their first major cock-up. This means that they don't suffer fools gladly and will jump on anyone who is not up to scratch. Perversely, it's much more enjoyable to work with this sort of a producer than with someone who tries hard to be liked and doesn't have the respect of the crew.
Wannabees are something else. They just think that they're a producer but are incompetant. They are either weak with the crew and get walked over or try to disguise their inexperience with arrogance. They talk big and deliver small. They will not have a series of successes behind them and will blame their failures on someone else. Beware of the producer who constantly says "When I was at (insert impressive company here)" as there will be a reason that they're no longer there, usually due to not making the grade. "Proper" producers don't need to impress the crew, wannabbes find it essential to try.
A lot of people in marketting or
PR companies think that, because they are organising a video, they are a producer. They also think that because their company calls them a producer, they know everything about television. These are the most dangerous "wannabees" as they don't have the experience to know when, and where to step in.
So, in my experience, asshole producers in television, broadcast and drama are very rare, asshole so-called producers in marketting, student productions and corporate shoots are common.