Hear me out:
The only, absolutely only reason why people don’t generally marry on the first date is to figure out whether they DON’T fit together.
So if you manage to figure out that the relationship is not going to work out before you get into real commitments (kids, mortgage, …) you successfully avoided trouble.
I see it so often that people think that dating is already a strong commitment and that ending a dead-end relationship is a failure.
There is no shame in realizing the relationship is going nowhere and ending it.
One of my favorite lessons from my favorite sex and relationship podcasts hosts (Dan Savage) is his advice about short term relationships being a successful relationship if done correctly. The same ideas as discussed here but more general. If not the only “successful” relations ends with someone in a coffin