I think some PP's have missed the point of this. It's not about whether he finds her being overweight a problem, the problem is that he chose to tell her that in the most disrespectful, callous and rude way (not to mention at the most insensitive time)
OP, I promise you it is him and not you. Your post yesterday rang massive alarm bells. This might sound far fetched but have you ever considered that your DP might be a psychopath? Around 1/100 of the population are psychopaths and they're not all axe crazed murderers (a big myth).
It concerns me that he acts 'robotic' and without human emotions. This by definition is what a psychopath is, someone with flat effect (feels no genuine emotion other than anger) and lack of empathy (which he has shown by being unsupportive and emotionally abusive).
Psychopaths are all very narcissistic so you may wish to read up on the many signs of that but here are a few I can tell from your post.
- The fact that he is openly unwilling to save your marraige by going to counselling shows he knows what he is doing but he has no interest in changing it and then uses threats to make you comply (self-centredness, entitlement)
- the hurtful putdowns are designed to erode your self esteem so that you are less likely to leave (devaluation)
- narcissists have very fragile egos and will react harshly with even the slightest perceived criticism, real or imagined (I.e him not being able to get an erection) which he cannot face so he would rather blame you for it (projection)
4.Supeficial/grandiose. narcissists are unable to love in the true sense of the word and therefore any relationships they have lack any real emotional depth and they focus on superficial things that they can show off to the world e.g. a partner with money, good career, mainstream image of beautiful etc. (because you are an extension of them in their eyes, if they are associated to these things they think it also applies to them).
- Irresponsibility. They will take zero responsibility in anything they do so he won't apologise unless he's really cornered. A partner who truly cares about you would be genuinely upset (not just words but actions/body language) if they knew they had hurt their partner so badly to the point where they have stopped eating.
You say there are other issues in your relationship and I wonder if there is more abuse going on than you are really saying
These men never change OP, you need to get to the G.P ASAP and sort out your mental health (which no doubt your 'D'P has contributed to significantly) and then carefully figure out how to escape this emotionally abusive marraige.