What motivates someone to key a Tesla
I recommend looking at the literature on aggressive behavior, e.g., https://en.wikipedia.org/wiki/Aggression. There are many potential causes for such an act. In terms of generic predispositions, consider personality types (e.g., low Agreeableness), but don't overlook the importance of context and culture (e.g., high wealth inequality).

As to the final question, self-help questions are out of scope for this forum.