What do you mean the legs broke as always? Can you show a screen shot of the sliced model and/or the STL? As it stands (heh) these look like they would be difficult to print in one piece.
It's not a slice problem, I have a cheap chinese printer that never really worked very well. I think the hot end is broken or something. Do you know when you print something too cold and the layers don't stick? That's what always happens. I printed those in 235⁰ and they still came out fragile with the layers breaking so I just glued the legs with some epox and now it's good. Its just a toy so it doesn't need to last long, but it is very frustrating for sure
Do you have layers of better layer adhesion and layers of worse? Not to ask the dumb question, but what does your hot end temp look like over the course of a print? You could need something as basic as a PID tune or you might have a failing wire.