I believe they started designing levels with very few moves in order to push people to buy boosters. Some levels, like this one, are impossible to pass if not with a booster combo from the start. They need to make money...
Most of the times they go eat something else than what they should (blocks or chocolate). They are especially useless when it comes to the magic grinder. The grinder should explode after 5 hits, but you can have a whole bunch of fishes going to "bite" a grinder with no result at all. MAKE THEM WORK!