You're right, I didn't give sufficient consideration to the benefits you might get from IRC, and I'm sorry about that. I still think what you said about trans people (especially referring to them as "monstrous abortions", even jocularly) is really bad, but if attempting to police that kind of language for yourself would seriously damage the value of IRC as a coping mechanism for you, then it is a more difficult situation than I imagined. Perhaps you could ask a trusted friend who's also a regular on the channel to give you a heads up by PM if what you say gets a little too offensive? I don't know... I do think you're underestimating the extent to which comments of the sort you made are harmful. There are very few communities on the internet (or in real life, for that matter) that are even remotely welcoming to trans people, and I'd like LW to be one of them. But I've said my piece and I'm not going to push it. Sorry for getting too fighty. I should have appreciated that you feel a little blindsided and that piling on doesn't help.
This careful reconsideration of the subject, subsequent apology, and declaration of an intent to change your behavior are admirable - and a bit ironic, in this situation.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.