There could be many reasons. I don’t know where they are deploying them, how much training the crews have had and many others that factor into survivability. I’m not saying the Abrams is the best tank ever, just saying that there are many factors that can contribute to why they aren’t doing well in the field for the Ukraine.
There a lot of factors in to why the Abrams isn’t doing as well in Ukraine. Like the article stated, drone attacks are a new threat that no older tank was designed for. Then there is the lack of training. The US has trained a lot with these tanks and know their weaknesses and develop their tactics with this knowledge in mind.