They completely bypass the community procedures in place, deal out arbitrary sanctions without any explanation or justification and simultaneously refuse to deal with real issues that the community(ies) really can not deal with.
Quoting a Wikimedia steward (Rschen): "I know for Croatian [Wikipedia] we stewards point-blank asked T&S if they would do anything about it and they said no."
https://en.wikipedia.org/wiki/Wikipedia:Community_response_t...
https://en.wikipedia.org/wiki/Wikipedia:Community_response_t...
https://en.wikipedia.org/wiki/Wikipedia:Community_response_t...