My husband calls me an emotional wreck whenever I express my feelings

My husband and I have conflict resolution issues. I usually tend to go cold when I am upset and expect my husband to amend things. We decided that wasn't healthy and I asked him how he would like me to be. He told me he would like if I communicated issues without bottling things up and be open. I started to implement that and his reaction has been the same, he criticises me for being upset and says I overreact and I shouldn't be upset and tells me to get over things.

He has kids from a previous marriage and he communicates with his ex through WhatsApp about his kids. I too have an ex with kids and I don't speak to him because my husband prefers that communication go through him and i happily comply. I also requested for him to get someone involved with his communication with his ex too and he told me there is no one and he hates speaking to her and anything got to do with her but he must. Recently he told me he wants to make another chat with her through iMessage and put the kids in there too. I felt uncomfortable because it's just another door for communication that is unnecessary, his kids are teens!

Anyway I expressed my concern to him respectfully because he said I can come to him when I feel upset and he would comfort me. He is travelling and away for a few weeks, so I said it through a nice voice msg. He ended up dismissing me and saying "I'll think about it" although I said there was 0 need for it. I sent another msg saying please understand it's causing me distress and other nice words. He again dismissed me and said I'm sleeping now etc. so the next morning I thought he would have texted me back reassuring me as I just expressed my sadness and stress. He pretended like nothing happened and gave me updates about irrelevant things. I sent him another text showing how upset I was he was acting like everything was normal. I just wanted reassurance... he acted like he had no clue what was going on. Then hours later he called and I cried as I was expressing myself and told him how I felt triggered and like he doesn't care because he told me to communicate and this is the result he basically called me an emotional wreck and a baby and started laughing and saying I am negative Nancy and I cried and said u want me to beg like a dog for a bit of mercy from u. And then he said I didn't tell u? Oh I meant make a group chat with just the kids.... I stopped crying from shock because he did not say that to me and I told him that and he said yeah , there go ur tears...
He said he would not apologise or try to fix things because he doesn't give two what I think of him. And he said he despises my sadness.

This is an example of what happens very often. All I am seeking is some reassurance and validation in my emotions, I feel like a burden because I have emotions

Allah is my witness, I do and would do everything and anything for my husband and he would vouch for that. Anything he wants I will adapt asap. This is the only thing affecting me in our marriage and clearly I have tried to do what he asked with communicating and it didn't work. I can't help but think divorce is the only solution.

It's been 7 hours and he still hasn't called me or anything and even if he does he will just make me feel guilty for showing some sadness and unhappiness.