TikTok

The absolute worst experience I've had with any service in 40 years of being an entrepreneur. The app itself fails to sync to TikTok shop if you have more than 100 SKUs because new accounts are under a trial period, but you can't just select some items manually to only sync part of your products. All that doesn't matter though because their AI couldn't verify my business even after submitting 20+ requested docs twice with their chat agent guiding me on the 2nd and final appeal. The crazy part is they verified my business on my ad account with the exact same docs. Overall the absolute biggest waste of time and energy.