1) you only get daily quests for the days that you log in. If you take 3 days off you don't get 3 dailies, you get 1.
2) most of the quests are structured so you need to play most of a match and/or perform well.
This kid is a Fortnight speedrunning champion
1) playing enough in a season to get enough v-bucks to buy the next season
2) not spending that on anything else
3) playing enough next season to get enough for the following season
3) not spending that on anything else