When queries get too complex or too slow it is often an indication that there is some thing about your model that does not support your use case.
<aside> ⚠️ This is pretty disorganized, and will not be organized in the immediate future
</aside>
MongoDB Official Documentation
Choosing a shard key for MongoDB
Optimize for write performance with Cosmos DB using the MongoDB API
Read Concern - Write Concern - Read Preference - What does it mean?