Well, many of your responses are several thousand words long and many of your responses are "I've already told you they're bad". Yet I'm with
@Faolyn on this one, I don't know what you want. You say you like firbolg lore but change a phrase or two here and there and to me the base entries for firbolgs and halflings could practically be swapped. You say halflings aren't important, but what would make them "important"? Conquering nations? Being fierce warriors? Creating items in the DMG, practically all of which are directly related to adventuring and making combatants more effective?
All of the races are just the bare outlines of an entire culture waiting to be given life by a campaign setting if the DM and players care. All races basically represent some extreme example of humanity. Halflings are the people that are for the most part perfectly okay with being unexceptional and just enjoying their life. Like most of humanity. Saying they're unimportant is kind of like saying that people that don't go into politics, aren't famous, don't strive to be the best possible at their profession to the detriment of all else are unimportant. Yes, Elon Musk is important. That doesn't mean that Joe the janitor that is happy cleaning the office and going home to spend time with his wife and kids is unimportant. Especially when Joe is extremely brave and will risk life and limb to protect his family, neighbor or friend from danger.
Maybe the janitors (and school teachers and factory line workers and that guy that sells you that slushy, etc.) of the world aren't important to you. But that means they don't count. Just because you don't like halflings doesn't mean there's anything wrong with them.