"Today's"? Has something changed? If it hasn't changed for the better, not discouraging more ranting discussion here, but meanwhile you can catch up on some of the earlier comments:

• Is The History Channel losing more and more credibility by persisting with their "Ancient Aliens" series (now in its sixth season)?

• How is the History Channel able to get seemingly respectable historians to say ridiculous things in their documentaries?

• Ever since "Ancient Aliens" was thoroughly debunked, I can no longer trust The History Channel. Am I right in feeling this way?

• You're in charge of the History Channel.

There are also many threads which ask about the accuracy of specific programs; a quick search of "history channel" or program titles will turn up pages of posts with more specific feedback

You may also find this discussion of the BBC vs American public/commercial broadcasting of interest

• What factors lead to the different broadcast media models in the US and the UK? Specifically, why is PBS (or some other public American network) not on par with the BBC in terms of market share?

I believe that all of these posts have been archived by now, so if you have follow-up questions on any of these, just ask them here; mention the relevant user's username to notify them.