burning bridges
departing from an arrangement, relationship or situation in such a way that returning is difficult or impossible
snitch
To snitch on a person means to tell someone in authority that the person has done something bad or wrong. --collilnsdictionary.com
virtue signaling
expression of a moral viewpoint with the intent of communicating good character --wikipedia
false flag operation
"an act committed with the intent of disguising the actual source of responsibility and pinning blame on another party" --wikipedia
"making lemonade when life gives you lemons"
Lemons suggest sourness or difficulty in life; making lemonade is turning them into something positive or desirable. --wikipedia
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