Almost every major corporate American CEO has shown super for Trump and the fascists more broadly at some point, trying to boycott every company run by them is both too expensive and unreasonably difficult for me and most people, so that doesn't mean much to me. Boycotting means very little in this case compared to using the government to force changes across all industry everywhere. My main issue with Taco Bell and other YUM brands is their extraordinary-even-for-their-industry exploitation of workers, but again, that's nearly universal across fast food (though I do mostly boycott that industry entirely).

Dairy cows are distinct breeds from beef cows, and generally their meat is very poor in quality and quantity compared to beef cows. Only a small portion of all beef production comes from them, and an unusually large portion of it becomes ground or otherwise processed beef due to the poor quality. However, it's essentially a waste product of the dairy industry, so assuming we're not shutting the dairy industry down, it's generally a good thing that someone is able to put a portion of it to good use. Not that I'm endorsing Taco Bell or anything, but at least it's a less shitty method of operation than some others in the industry.