For a long time I too never got lucky on paladin weapon drops, although I had various Ifrit weapons for other roles. As a temporary measure I used the lv70 sword and shield that are purchased with PvP tokens. There are also crafted weapons to consider. Eventually I decided that I just have to do the relic quest for paladin, and I got the curtana and holy shield. Relying on random drops from primals will lead to frustration as you have discovered since it's never guaranteed you will get anything. I would just never expect or hold your breath on random loot since it will lead to disappointment, and pursue other things. If you do get a random loot, consider yourself lucky.