I see two things: brown dead tips, can be anything from pinching, over- or underwatering, high shade.
And I'm seeing weird growths that turn the tips into diamond shaped cones. That last one I only know from wild yamadori from Spain, Italy and Portugal, it's caused by an insect that usually attacks Taxus.
Are you by any chance located in southern Europe? those insects are native there and I don't know how to treat for those other than cutting the parts off. Most of the time it doesn't come back after that, but that's because I live 400+km away from those areas where they are present.