The use of deprecated functions

[fobatai]

Hey Guys,
i am running into some issues when creating a project.
First of all, i am not a experience coder so this might be my own fault. But i do have some coding experience with python for example so i can troubleshoot alot. The main issue i have is if i start a new project he is prefering react/node.js and mongodb.
Which is also fine by me. but he is using so much deprecated functions that it frustrates me.
Example:
I need to use MongoDB so i installed that.
Then he asks me to verify the db by using the command Mongo in cmd. Which doesn't work since along time ago(!)
That isn't that much of a issue since apperently you need to download is seperatly as MongoSH . If i tell him that but he thinks its somthing wrong with path. Well ok.I troubleshoot my way out of it....
Then he starts useing schema's.... but he uses useCreateIndex apperantly also deprecated...
Isn't there a way to avoid this by adding a "old-crap don't use"-agent or so?