Top Eleven decreased the injuries number very much recently and by recently I mean in the last months. I don't think the game should do more or could do more and I am saying this as an addicted player.

I have only my team but I also helped few managers recently and none of them including me had real issues with injuries.

It's also about luck because if you meet many opponents with hard tackling you might get some nice injuries but if you play your games with over 80-90% condition I don't think you can have big issues.

It happened to me too in the past, in one season I had more injuries then days in-game, in 28 days I had over 30 injuries but not recently and my number of red packs increased very fast.

You should also look for some good subs to replace the injured players and save some red packs.

Good luck!