Sorry to hear that. I only had to contact support for a battery replacement on my Z510, and it was pretty okay.
But there’s one thing I’m not sure you know, ThinkPad was originally an IBM product, for years. Not it’s with Lenovo, like Motorola is. But I’m not sure how the two operate business wise. IBM ThinkPads were way better than the modern day Lenovo ones. But Lenovo ThinkPads, today, are miles ahead compared to any other Lenovo laptop.