See Genesis 9:3-4. I don’t think red meat is wrong, I like it a lot, but I do see blood as problematic, since biblically eating blood is forbidden. But I did eat it anyways AFTER praying and wiping away all marks of blood (I was in a restaurant). I do pray I made the right choice and the meat was undefiled (I believe it was, but am only 99 %ly sure, not 100, hence why I ask). God bless☺️