I over spice everything, garlic included, but:

I had a girlfriend that misread a recipe and made a pot of gazpacho with four whole heads of garlic instead of four segments. It was quite spicy, but I loved her and ate it anyway.

No matter how much I showered and brushed my teeth I stank of garlic for the next couple days.

It was tasty, though.

Nah, I put too much garlic into Hummus the first time I made it.

There’s definitely such a thing as too much garlic. At least RAW garlic. It was nearly inedible and I quite like garlic.

Quadruple it in most recipes.

I have never heard “whoa, there’s too much garlic in this”.

I usually just change “cloves” to “heads” and then the recipe is about right.