Does everyone hate MongoDB?
I think a lot of the "hating" is a side effect of MongoDB being consistently oversold in terms of its capabilities and architecture. Many people who are not experts on databases discover this the hard way later. If the claims about it were qualified a little better and the limitations acknowledged more openly by its proponents it would help to mitigate this outcome.I am indifferent to MongoDB but I do caution people that the internals and implementation are quite primitive for a database engine. It is the sort of database engine that a programmer that knows little about database engines would build. Over the years that has repeatedly manifested as problems no one should ever expect a database engine to have if properly designed. There is a reasonable point where you should not have to read the documentation to see if your database has a basic design flaw; there is an assumption of competent architecture for its nominal use cases.MongoDB has improved in this regard over time and many other popular NoSQL (and SQL) databases have similar problems. Users are being asked to cut the database some slack for less than competent engineering choices but users just want a database to work. Being "simple" isn't enough.