I have similar experience for Febi parts in 2 countries, Pakistan and USA.
Install anything - e.g. a tie rod assembly and after a year the rubber boots rot, same for lower arm bushings - after a year they dry rotted out. same with ball joints, d/s flex discs and other sundry items.
Or even the old 123 series engine mounts, OE lemforder ones last a long time, new febi ones turn to bubble gum in about 2 years. I even had the same experience with 124 hydraulic mounts, the OE corteco and lemforder ones work the longest.