Not every company is at the same risk of being underserved. The companies most likely to be getting inadequate service from their TMC share a common profile: they're mid-size, with somewhere between $200K and $2M in annual travel spend. Large enough to need real management, but not large enough to be a priority account at an enterprise TMC.
At providers like Navan, BCD Travel, and Egencia, the economics work best on accounts spending $5M or more annually. Below that threshold, you're typically routed to a shared service model — a pool of agents handling many accounts, no named contact, limited customization. The platform technology may be excellent, but the human layer is effectively absent.
This isn't a criticism of those platforms — it's just how the economics of enterprise software work. But if your company is in that $100K–$2M range and you feel like an afterthought, that feeling is accurate.