You think its some conspiracy but you really don’t understand how transform works. All stats except hp are exactly copied so are the natures positive and negative effects and the EVs and IVs effects apply as well. However if the ditto has hidden power, then hidden powers type will be determined by your dittos IVs rather than the opponents
This has always been the same mechanic since HP was introduced. So you clearly don’t know how transform works.
You can literally google this.
Lol, don’t get mad when someone is telling you the right things.