If you don't feel comfortable with any therapist then don't continue. Therapists are supposed to probe and challenge, but in a healthy way that supports your recovery as individuals and as a couple. In my country there are professional codes of conduct for registered psychotherapists and counsellors and recognised qualifications, but there are still plenty of unregulated people setting themselves up as 'life coaches' and all sorts, so it's worth researching what kind of therapist you think you'd benefit most from. Having said that, I'm sure there are some very good 'coaches' that specialise in porn and sex addiction and some highly qualified relationship therapists who wouldn't have a clue. Whoever you see, it has to feel right for you.
Body image issues. What can I say? Lol! I'm not overweight in the slightest but I know that the effects of being in a relationship with a porn addict can devastate a woman's self image. Sometimes it can manifest in poor eating habits as a symptom of depression and low self esteem, and part of our recovery can mean we have to respect and nurture ourselves but that's not necessarily anything to do with weight. Sure, sugar is habit forming and there is such a thing as emotional eating, and yes, food stimulates the same pleasure and reward pathways in the brain in a similar way that porn does for porn addicts. Yes, these CAN be issues and they can happen for many reasons. But you can have these problems if you're a big girl or a skinny Minnie. I think it was wrong of the therapist to make these comments in the absence of establishing YOUR truth. Suppose your weight gain was due to medication or a thyroid problem, for example? Suppose you never touched sugary foods? She didn't know. I don't get this fixation with weight anyway. Physical health is more important than the numbers on the scale. If you can go hiking and backpacking, chances are you're physically fit. A healthy body is the ideal body, regardless of size.
Many people find that it's not easy to find a relationship counsellor who is also aware of porn and sex addiction. Your ideal therapist should be trained in porn/sex addiction as well as couples counselling. Taking a more balanced view, it's true that therapists see a wide range of couples, some of whom can mutually accept porn in their marriage. And that's fine if it works for both partners and both are accepting its presence, and not a case of one being pressurised into going along with it any he's in reality they don't care for it at all. Many partners of porn addicts have tolerated porn or agreed to it only to regret it later on when their partner is more interested in what's on the screen that the person they're having sex with or who wants to act out porn scenes that their spouse isn't into. Eventually we all end up in the same place ? as partners of porn addicts. If porn is a problem in the relationship, then it's a problem. Simple as that.
I would also add that porn can mask pre existing problems in the relationship AND it creates a whole lot more. So it's a complex problem that requires expert help.