I'm sorry you feel that way, but leveling has not suddenly become impossible, a little harder maybe but not that much, try to keep a positive attitude :\
When I started playing RO, seals or soils didn't even exist and we still found ways to level back then.
Seal isn't so bad by the way, it's just no longer a place for 5-6 people to level at real fast anymore since they have a respawn time. If you put drainliar cards in your weapon, consider going to Anolian instead, they are water monster as well and there is 60 of them on cmd_fild03 map.