Frankly, this excessive injuries thing (especially the timing, that is, too many injuries occurring in short periods of time) is probably not intentional. This is too discouraging to users for it to be from the company unless the people there have another way of thinking. I have already reported this issue to skyqueen and she said that they are going to look into it.
Some users talked about selling the injured players and buy other players; others talk about buying tokens for red packs or forced to use red packs. My point is how can you sell players that you made so much effort in getting (by waking up early, watching for them on the transfer market, fighting for them by bidding and so on)? Why would you sell players that you spent many green packs on to train to reach a certain quality level or to gain a special ability or an additional playing position? What if you can't afford to buy more tokens to get red packs to heal them? If you have too many players injured, the game is almost non-playable. How about during competition matches? You can't heal injured players during matches. The amount of substitutions allowed is limited and usually substitutions lower your team quality during the game as players used as substitutes tend to be of lower quality than the main team. This does not make any sense.