Help me settle a garden design dispute please

[plantingandpotting]

Today I planned to section off an area of our lawn and cover it with cardboard and top with woodchip, to create a more defined area for the chair.

The reasoning is that the grass there looks terrible - it's shaded so is getting thin and mossy. I also dislike lawn in general and wouldn't have any in an ideal world.

Having planned to just crack on with it (as the garden is really my remit) DH countered that it's a terrible idea and we should just look after the grass better (I have no desire to nurture grass).

Open to be told I'm wrong here. Would this look good and add some depth / texture to an otherwise uninspiring area?

Pics for reference. I also planned to edge the area with these
www.homebase.co.uk/willow-garden-edging-100-x-35cm/13971224.html?switchcurrency=GBP&shippingcountry=GB&affil=thggps&affil=thgppc&gad_source=1&gclid=CjwKCAjwydSzBhBOEiwAj0XN4OmLFrFWr4d_b2d7stl90RcxzIMP9pZnpPUhM_hlsz4sRWaUCshD1RoC6E0QAvD_BwE&gclsrc=aw.ds

I've seen it growing in a swamp, and it colonised all the edges of my ponds, growing half in the water. Also in a car park in the mediterranean, with no water for months.

Other than extended wet cold, I don't think anything can do for it. Sadly, extended wet cold is exactly what I get in my current garden.

That looks really good, OP!

Other than extended wet cold, I don't think anything can do for it

Drat... that probably rules it out for a lot of the U.K., certainly my bit.