Basic blender went bad (motor ran but spindle wasn’t rotating). I wanted to disassemble to see if it could be repaired. Three of the four screws were Phillips head. I had to cut the casing open in order to discover why I couldn’t unscrew the fourth. It was a slotted spanner.
Oh, so you’re certain that OP even tried to lookup a service manual, and that there’s not one available? Endoscope and the right screwdriver together are still cheaper than a new blender.
Ever heard of a teardown? Go watch some on Youtube or Peertube. You won’t find many that fail to disclose the manufacturer, that break the plastics, nor will you find many, if any, blenders that use a more common screw-head for the motor shaft.
… but sure, pontificate on behalf of targetted rage-bait that actively discredits this community versus anyone with an ounce of experience or common sense.
I deal with worse than this Blender on a daily basis, or rather I might, if the internals of the devices I work with weren’t behind literal lock-and-key, and yet, NONE of them are left un-supervised with your standard schmuck, their CHILDREN and pets.
HIDDEN screws, glues, DRM and fragile tabs are indeed a real problem. They are major reasons we need service manuals and “guitar pics” and all sorts of other non-sense that inspired the Right-to-Repair movement. OP’s Blender has NONE of those things.