Take the passive-aggressive nerd approach:

1. Start a niche online movement that only cares about one aspect of computing and convinces people all their problems are caused by your pet peeve

2. let the company dig its grave

3. create a FOSS alternative

4. sell a premium version for businesses (it includes phone support and management-friendly marketing matetials)

5. congrats, you are now the de facto standard software in your field