Uber's comp packages are probably right in line with that. Tech salaries are trimodal, and uber's right in line with the big public tech companies.

https://newsletter.pragmaticengineer.com/p/trimodal

There is a tier just outside of FAANG that pays similarly or better, prominent examples being Uber, Airbnb, Stripe, Block, Databricks, Datadog, Pinterest, Snowflake, etc.

250k for base pay is about in line with median I'd say.

If 250k was the total comp (taking into account bonus/stocks/what have you) then yeah, you definitely should have negotiated.