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I don't have any pics of a thumbnail tested edge but this one was only lightly brushed against a fingernail. You can see the deflection in the centre of edge.
I think leadingedge explained the...

As has been explained this is a test used at bevel setting stage only. It is damaging to a shave ready razor.
You need to get your razors re-honed & then focus on your stropping & shaving.

Have you tried to shave yourself with a disposable like the barber used?

That would eliminate the blade as a problem. Strong chance the fault is in something you're doing/not doing eg...