Exactly what I said to my friends who play casually and they all agree.
If you don't have the time to play 30 minutes a day, don't expect to gear as fast as people that put twice amount of time into the game.
You don't see guilds with 3 raid days a week complaining that they don't kill bosses and get loot as fast as guilds that raid 20 hours a day until content is clear.