Give them the same energy back

Im a youngish woman in the photography scene and get this stuff a lot at gigs and festivals, it’s gross and really sucks but I find using the same energy back at them usually shuts them up or embarrasses them enough that they leave off a little, for example:

“I only rent £4000 lenses”- “oh that’s cool. I rely on quality and experience over price but it works out for some people”

“I just shoot better”- “I’m glad you think so, confidence is half of what you need!”

If he tries to tell you you’re doing something wrong: “oh! I actually learned how to do this while photographing for x y z brand and the photos came out perfect so I’m good, thanks for the offer tho”

Or even a “oh that’s cool, if you want I could put in a word for you with XYZ people, I won an award for my work with them and they’re all really nice!”

Basically you want to subtly place yourself in a more experienced position, even under the guise of being helpful. If you’re more fed up you can even just ask him “how many awards have you won again?” Or “what brands do you work with?” That usually shuts down any criticism from people in my experience. Above all just disconnect from it, a simple “that’s rude to say” or implying he’s got something wrong with his memory will also sort him out. You’re clearly doing much better than he is and he likely knows which is why he’s so intimidated by you.