That's a bold claim, do you have a source?
According to the linked article in the OP, 170k children went through this Romanian system.
According to numbers just from Canada's residential School system, over 150k children were stolen from their families and beaten, abused, and often killed in pseudo-prisons. (https://www.cbsnews.com/news/canada-residential-schools-unmarked-graves-indigenous-children-60-minutes-2022-02-06/)
Numbers for the US are hard to come by, but the US dept of the interior estimates that "tens of thousands" of indian children died in their residential School system. (https://www.bia.gov/sites/default/files/dup/inline-files/bsi_investigative_report_may_2022_508.pdf)
This isn't a competition to see who is worse. Virtually every country on earth has committed unspeakable atrocities, many of them are still doing so today. Acting like this was a product of communism doesn't add anything useful to the discussion and just carries water for the parties who continue to commit similar atrocities under Western Capitalism.
Sure that part's electric, but what about the bonds keeping the quarks of the train together?