Of course 3 months is going to get you running with a solid basic knowledge of your stuff.
In what world would low-level, algorithms and data structures be doable in 3 months?
Point is, I don't think Bootcamps and Colleges are comparable.
It's like being a woodworker and a forester..
There's a place for each and it's not the same positions...
Now, here's my big question:
If your interview includes Practical programming, Web system Design, Algorithms and Low level system design...
What in the nine hells are you hiring for?
Had it been for a trucker position you'd be asking for "driving license, laws and regulations, engine design and car physics"..
For reference: https://i.imgur.com/sh7LJgj.jpg