It is so bad that I use whatever TV time I have to catch up on history channels like PBS America (CH91) and Yesterday (CH25).
Really good they are but as for the main channels, I agree they are almost unwatchable.
Can't be dealing with the American channels, as they are made for people even more thick that the average British viewer, so take dumbing down to way beyond BBC levels.
Plus, been for the Sherman market with ad breaks every 10 minutes, nothing is actually learnt in an hour long programme, as every 6 minutes, we have to have a recap of the pre ad section, and then look forward to what will be later in the programme. By the time that recap is complete, its time for another ad break, and the whole thing repeats.
The Nazi Channel (Yesterday) has good, if dumbed down, programmes. But there are limits to how many times I can watch about the abandoned Goat Canyon Trestle bridge...