You would have to overhaul all the basic tenets of the game, as well as the various real life dictionaries that define intelligence as raw capacity to learn and process information. Look up the real meaning of ignorance, not the modern day slang. "Ignorance" is defined as lack of knowledge. Intelligence is the ability to learn, retain, and use said knowledge.
I am ignorant on how to disassemble and reassemble a car engine, but I am intelligent enough to learn how to do it.
What you are describing, well, you would have to tear up the mechanics of a 5e Barbarian.
Rage is STR focused.
Unarmoured Defense is Dex and Con focused
Reckless Attack is Str focused
Danger Sense is Dex focused.
Feral Instinct is Dex focused.
If you want to play a high Int Barbarian, you have to be prepared to sacrifice in one of the 3 Stats I just laid out. So you are talking to the wrng people. You want to play a high Int Barbarian with no penalties, then talk to WOTC about overhauling the class in 6e.