I'm playing this offline, but I have no idea if we will be banned, or even what being banned looks like.
The trainer was created and tested in offline mode, but as usual the developers load these games up with frame rate dropping anti cheat bullcrap, even for single player offline.
There is the option of not using the trainer at all... Cal and 0x90 do their best to make options everyone will like, but you can't please everyone all the time (apparently that group includes you), otherwise there would be only one trainer for one game on this site and it would have 1,000,000,000,000 options. As for the items quantity, there is a request system.
Please use the trainer option request system for requesting new options be added to this trainer and/or vote on options already requested.
"Also, no option to set quantity of items?"
game has anticheats.. thus the game will crash if it detects code changes.. so we cannot just do anything with this game, given how it works..
if you don't want to set the levels, then don't do it.