If a bearing is too stuck for a YYF Multi-Tool to remove, then it’s way too tight.
First, I have to know: What yoyo was the bearing in? That may explain a lot. Many YYF’s are really tight to the inner race of the bearing. They aren’t the only ones but they have many models with a reputation for “Bearing Seat Grip Of Death”. Some gentle sanding of the bearing seat(remove the ano) will typically be all you need to do to resolve the issue.
Second, the short shaft of the bearing puller in the YYF multi-tool, combined with it being nested in plastic, doesn’t give a lot of leverage, especially for really stuck bearings.
Third: Sometimes you need more leverage. I got a fantastic bearing puller with my C3 DiBase. C bearing only, but it’s perfect. I also have the X3 bearing puller for dealing with C and Euro-C(L) bearings. If that ain’t gonna do it, it’s pliers time.
The bearing might still be salvageable.
A tool breaking doesn’t surprise me. One should NOT need to use sufficient force to DESTROY the tool in order to remove the bearing.
If you’re near me, I’ll remove the bearing from the puller for you. It might take a few minutes, but I’m fairly positive I can save the bearing.