Lots of people here are shitting on mongodb(maybe rightly so). But I think the biggest problem is that the developers making the decision on what kind of DB to

Lots of people here are shitting on mongodb(maybe rightly so). But I think the biggest problem is that the developers making the decision on what kind of DB to use just do not understand these tools. I always recommend reading Designing Data Intensive Applications as soon as you have an inkling that you will be asked to make such decisions in the near future.