This is mainly something from non-english speaking countries, but do you have any examples of terrible voice acting from your country?
From finland we have the stuff of legends that is Nordic Agapio / Agapio Racing Team. Legend tells us it was just a Mom & her two sons who did all the voices, and it was an elaborate scam. Whatever is the truth, for some reason they dubbed about half all cartoons shown in finland in the 90's and early 2000's. Some things were redubbed (Digimon), but others only exist with the infamously bad dubs.
Example A (If I start singing this in the car my mom will try to kill me)
A song from the My little pony cartoon from the 80's
Top comment translated is
"It's no wonder the unicorns disappeared, having to listen to this singing"
Example B
This is some weird song about I think hawaii? And a dolphin? And some octopus? wtf? I remember this show vaguely and I remember this show was shit.
Example C
The stuff of legends. The finnish Digimon dub.
I swear to you, finnish voice acting from this era was actually pretty good. Not just whatever this was.