Most of the organizations that are successful are so because they had a coherent vision for what the product would be and a passion for solving that particular niche's problem. I'm not sure how anger/vengeance rather than a passion for the problem space is going to positively change the customer's perception of the product's long term vision, support and guarantees. Imagine trying to poach a Salesforce client and they ask you why would they need to invest time and money into migrating to your solution and all you got is "haha, fuck salesforce, they fired me".
The idea seems noble, but a good market-fit product is more than just code sitting inside a github repository. That's why there have always been open source alternatives to commercial CRMs long before AI even came into the picture but they never took off.