I'm experiencing the same frustration!!
I've been working on getting the Homestead furniture pack: woodworking.... 12 items unlocks a type of furniture/decor. Yes, it's 10 days longs. BUT.. The odds are NOT set up to get a new woodworking item even every other time. I started off with two Sims doing the hobby. Then, I purchased more LPs (real money) to quicken the process. Then I switched three more sims into woodworking hobby. I'd say the average success ratio is 1:5 sometimes 1:6 times that a new item is found! This is ridiculous. These are terrible odds, especially given that I've spent close to $40 on LPs. I'm fine with the money since it supports the game, but the odds are getting worse! Completely unfair! This game used to be fun and relaxing. I've restarted my current town and on level 40. My past town that I deleted was up to level 55. But I'm ready to bail for the "ungameliness" of getting these packs.