Who told you that kucoin is a scam? i've been using kucoin since 2017 if im not mistaken and i have never lose money, I even get free tokens, and never touch the token there and when i open my account its still there, maybe its user negligence, maybe their account has been hack, so far I never encounter issue, while using kucoin, why don't you try it for yourself, its better to check than to read reviews, just make sure to setup security features for security to avoid being hack or compromise account.
Where reviews are free what do you expect. When P2P was stopped in my country by government due to some misunderstanding, most people moved from using Binance to Kucoin, which landed as one of the biggest along side Binance. Seeing what happened to Binance, Kucoin immediately also stopped their P2P service as well, if they are scam it will be them taking the opportunity of offering P2P since the highest market has stopped.
Have you tried binance app, instead of browser base, if binance app work then you can use it, As i said i have been using kucoin for a long time, and most of my tokens are not being touch there, they have been hack last 2020 but after that no other issues have happen, so im sure kucoin is not a scam, but you can ask your friends who use kucoin if they get scam, most of the review sometimes are paid, sometimes not true or damaging the image of something that is not.