Hi there,
you’re using a 3 column Grid, the left and right handside ones being empty. I assume you’re doing this to narrow the content width. If thats the case the don’t do this 🙂 Remove the Grids that you’re using for this purpose and just add them inside a Container Block, in its Layout settings you can change its Container Width to the size you need.
Also check your container padding – some of the have 40% not 40px. Which is also eating up space.