Literally less than two years? In the EU you are probably eligible for a replacement, especially if some non-moving part (like sensors you mention below) fails.

I would prefer of course if producers made their products more sturdy (less e-waste).

What is breaking? FYI, you need to remove the ball from time to time and remove the dust that might be blocking the optical sensors.

Usually sensors stop working. I had a Kensington slimblade whose tracking light just stopped turning on, for example. No amount of cleaning will bring it back.