There are lots of soy sauces available that are low carb, like 1g,
sounds like the one you have has added sugar.

I don't know the carb count of the brand I use, but the ingredients
says:

water, soybeans, wheat, salt

The brand is Kikkoman.  They are quite trustworthy - in that the
fermentation is conducted without using anything to speed it up like
some other brands do.  The speeding up process can causes carcinogenic
substances to appear in the soy sauce.  So go get yourself some
Kikkoman.

Try tamari.
"Regular" Soy sauce is brewed with wheat.
Tamari is a kind of premium soy sauce that is made
without wheat.  It's more expensive, though.