Be careful about using crack version of Gunbot if it's from unknown sources the Crack gunbot might have a backdoor or any script that can steal your assets.

If you want a free version of trading I recommend you to check Gekko trading bot their official website is here https://gekko.wizb.it/
The only problem from this trading bot they only have few trading strategies but you can add more strategies manually the guide is included from their documentation you can find it from here "Make your own strategy with Gekko"

What trading bots have you used so far?

Since you used several bots already, there might be a chance that you already used some of the future suggestions here.

What are the things did you see at those bots that didn't meet your expectations?

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Hmm. so you are expecting that using trading bots should give you decent returns?