I bought a Logitech trackball (the MX5something), and the switches stopped working a year in. Amazon refunded me, so I bought an MX Master 3S. The switches for that also stopped working a year in.
I complained to the merchant and Logitech, and luckily they sent me a new mouse each. I also bought some replacement switches and repaired the lot, so now I have four mouses/trackballs. Still, they should make better mouses.