I’m 50. They’ve always been biased at least in my lifetime. You could see the clear bias even in the early 80s. What they’ve become since Obama came along in 08 is open and avowed propagandists. They don’t care about even appearing to be objective any more. They don’t care about journalistic ethics or standards of professionalism (eg at least two sources before publishing any story) anymore.
They’re just the propaganda arm of the Democrat party now. They do not hesitate to outright lie or to suppress major stories if it doesn’t suit their political narrative.
Back in the 60s a wise man told me “you can’t even believe the page numbers in Time magazine”