Bismuth losing to Fusions was kind of the point. She’s alone. Her toxic attitude makes it that way. The only times she had someone it ended badly for her because she tried to force it.
You know. As a parallel to how when the Crystal Gems, Lapis, Peridot, Steven, and Connie have emotional freakouts they try to run away and hide but their close connections and loving attitude keeps bringing their family back to them.
Bismuth also never found out about the Cluster, or how the Crystal Gems tried to use the shards from Shattered Gems to animate the armor Bismuth made them. We know Jasper is living in her house and don’t get to see that either.
Peridot was always a joke character. But she did stop getting starting episodes or episodes bonding with Lapis. At least she got the best Future one though.