The topic may be discussed by the whole body or just among the CBOE and the person giving the talk. If it was an actual marking talk then in theory it should have been agreed upon by the whole body.
If the talk was strongly worded, the gist is to get the rest of the congo to informally shun you because of your selfish decision to support yourself and your family instead of attending brainwashing sessions. If its well known that you are the target of the talk, expect your JW social life to drop to near zero, hopefully that won't break your heart!
Sounds to me like the perfect opportunity to "be stumbled" and quit the meetings altogether. If the elders call later, you can say how it really hurt your feelings that they would talk about you like that in front of the whole hall instead of lovingly counseling you in person, privately.