I realise you are venting but if you took the time to explain exactly what the problem is, list your specs, and what you've tried so far. Your more likely to get help, assuming that's what you want of course.
I think it's fair to say that if Sonar crashed everytime someone deleted a track it'd hardly have lasted this long, which tends to suggest that there's something specific to your system causing it.
You've two choices really try and track down and fix the problem or move on to something else that works for you. Declaring something that many of us use without an issue as 'crap' is probably not the best way to get a result. My tuppence worth........