Sorry you feel that way about my opinion of Mercola and his ilk, most of whom are working to end ALL consumption of ALL meats and using faux science to do so, imo.
I disagree with you about the quality of beef today. Maybe some of it is as you say, but I can honestly say I've rarely had a poor experience eating beef wherever that has been, even McDonalds, and I prefer my beef without any enhancements except maybe a bit of salt and pepper, though I do like the onion and tomato on a hamburger.
We have been told the home grown beef at our house is wonderfully flavorful and tender, so believe we do know what quality tastes like. But we travel a lot and eat in a variety of places from fast food to top of the line steak houses, and have even bought some at Walmart just to see what it is like, and any problems experienced have been the fault of the cook, imo.
I can understand you wanting to promote your own high quality beef, but do you really benefit from denigrating other beef, unless it is to share a specific 'bad experience' you have had? I believe doing that harms most other beef producers in the eyes of consumers, with no justification for it.