Is Excel open source? Sure, I could maybe write some VBA scripts to help Excel do something better (and have) or put in some feature requests in their issue tra

Is Excel open source? Sure, I could maybe write some VBA scripts to help Excel do something better (and have) or put in some feature requests in their issue tracker (is there a public one?), but I really don't get the attitude that "taking up space complaining" is something to be avoided.