Its not as hard to recognize good craftsmanship in furniture as in other types of products.
As someone who rarely/never buys furniture I have no idea what good craftsmanship looks like in the finished product.
It’s not really that hard, although of course with a couch the upholstery can hide a lot of sins.
I do know that heavy furniture is probably higher quality.
But that’s about it.
Not sure if I would spot particleboard, since it’s hidden under paint or as you said veneer.
My only realistic quality criteria are: - does it look old? - is it very heavy?