Problem lies with FIFA and PL.
FIFA for arranging the WC when they did, knowing that after it the PL players would have zero time for pre-season. Simple solution - reduce the number of participants in WC so it finishes earlier by having more preliminary rounds/knock out stages during the existing international breaks and start it a week or two earlier.
Instead of which fuckwits at FIFA want to expand the tournament and make it worse. I can see PFA taking FIFA to Human Right Court at some stage as its not fair to the players.
BTW, most of the injuries this season have been muscular (eg hamstrings) which happen when players are tired having played too much without a break and/or missing pre-season which is meant to condition players to play a reasonable amount of games in a season. The problem gets worse when a squad has 6 or so players out injured as the others need to play more every 3 or 4 days as there are fewer players. Its really not rocket science and should be well known within FIFA if they think they know about football.
Didn't help with PL pulling the start of the season forward by a week either.
Why did the PL not just delay the start of their season by 2-4 weeks, as after each Euro's and WC there are blank summers anyway?