I have never noticed this. Shows how the average consumer doesn’t really care about consistent design languages.

Given Valve’s history of taking play testing really seriously, I wonder if this is something they’ve realized through user testing?

I prefer it to most ui these days, tbh. Everything is either hypergeometric and boring, or forces mobile website design into desktop use for no good reason.

Your lack of sorting makes it look worse than it is.

Just looking at the buttons, they clearly have design documents, green is only used on buttons dealing with money.

Blue buttons primarily deals with social interactions or midrange store tasks

Grey buttons are for the local client