It seems as though this is done to encourage players who are deeply engaged in the game to purchase more lootboxes when they want something neat for themselves. By giving out lootboxes in large amounts on earlier levels some players get hooked on opening them and crave more. It's a smart move on their part in regards to profits, but I agree that there should be more free lootboxes given out as you progress into the higher levels. Hopefully the "battlepass" provides more content that doesn't need to be paid for.
Maybe, but from what I know the Battle Pass is suppose to be paid for
