Yes, and most of these love/hate memes are blowned out of proportion by people who don't actually have any real expertise in those technologies, but just parrot whatever they've read in some memes.
You're exactly correct. Tons of "XYZ is bad" because of some meme that they don't even understand or have context on that hasn't been relevant for years.
I have no idea if MongoDB is good or bad at this point, but the comments of "haha it's mongo" are completely devoid of meaningful content and should be flagged.
I was part of a team that operated a large Mongo cluster for most of the last decade. I would not have advised anyone to use Mongo as their durable source of truth database then, and I still don't think it's advisable to do so now. On numerous occasions, Mongo demonstrated the consequences of poor engineering judgment and an addled approach to logic in critical components responsible for data integrity. In addition, Mongo internalized many poor patterns with respect to performance and change management. Mongo did not, and does not provide the data integrity or performance guarantees that other databases internalize by design (the WiredTiger transition helped, but did not cure many of the issues).
PostgreSQL introduced JSONB GIN index support sometime around 2015, making Postgres a better fit for most JSON-based applications than Mongo.
My issue isn't with people not liking Mongo. It's with contentless meme posts. Your post has real information that adds value to the conversation, and I appreciate that you took the time to write it out.
Because it's (or at least it definitely WAS) true.
There are valid use-cases for mongo but for vast majority of things, you're better to start with postgres. And I say that as an early adopter - I really wanted mongo to succeed but it just failed all of my expectations. All of them.
It can be said Mongodb is hated ad much as Postgres is loved.
Personally I have no opinion about mongodb.