[throwawayffffas]

These are not bad decisions they are reasonable tradeoffs at the beginning.

Requiring HA, partitioning, and replication are good problems to have.

The alternative is spending engineering time on setting all these up for a failed service with like 100 users.

[esafak]

It is not good to have a problem that requires a year of migration by a dedicated team (typical case if you have this 'good problem') when you could have simply spent another day or two to architect it right. You should at least have a path to scale when the time comes.