I have tried many as well and the results are always the same. When you get a trading bot then you are getting something that follows a certain pattern and indicators you give it and it will move according to that 7/24 all day everyday. If the indicators you give to the bot is good and the market is ripe for the taking then you will make more money then almost all manual traders, since it is 7/24 and it checks hundreds of coins every second there is no way the the bot could fail on great markets.

Moreover, if the market is bad then there is no need for the bot, the indicators are all wonky and you may end up getting some coins that will drop a lot, which you can do yourself without the need of any bots. This is why I always say if you see the trend going up get a bot, if you see it going down sell the bot.