Another FBA seller copied all my custom products and listings

Not really here for advice. Just here to vent.

Just extremely frustrated that I put in all that time for researching keywords, finding a niche and building a brand over 8 years, only to have some random guy on the internet copy my entire catalog and compete with me on price. Dude went as far as competing with me on other ecom platforms I’m on as well using identical keywords in his titles for his products.

He’s using different photos and his descriptions are worded differently, but it’s pretty clear he knocked off my entire brand over the last year or so. I’ve lowered my prices to match because I’ve noticed the dip in sales. But it looks like going forward it may be a race to the bottom.