The same problem 1000 times esplained. They will not do anything. It's a way of making money. This amount of injuries cannot be present in a "simulator".

My best player got injured at he beggining of the season for 19 games! the rest of the season. Another one got injured for 5 days, I healed him for the CL semifinals and it got injured again in that match. I've healed again gor the 2nd leg... let's see what happens.

The injury system does not need to be improved. It just needs to be realistic.