Bugzilla is not easy to use. But it is a bugtracker and not a forum. I'm always a bit afraid of "Can't send mail. Please help!!!!" reports, hence Bugzilla does ask you for a lot of info and asks you to be exact.
However what you need to do is
* get an account
* click "Enter a new bug report" on the frontpage
* choose the category, or click "All" if you are unsure
* choose the application/component
* Set Version, Summary and fill in the template

If something is wrong or information missing, the Bugsquad will ask anyway, as Ima wrote here. :-)

There is a guided version (see Ima's link) but it's really noisy and ugly currently. I don't see advantages compared to the current situation.
We consider using the guided version by default for "new users" (not having bug edit permissions), but only after upgrading the maemo.org Bugzilla version to a more recent one (which is technically speaking highest priority currently).

I'm more than interested in any other feedback regarding Bugzilla.