Would you say something?

[Oksurething]

In short, a week ago I ended my relationship with boyfriend of 1.5 years. For a few strong reasons.. but this thing has shocked me - and I'm not sure if I should tell him -
As I've ended it anyway, I looked through his phone (I know, I know) and in a long text, his ex was lashing out because he hadn't been in contact or provided for their daughter (I agreed with all she said, he is a shit dad, largely why I've ended it) but she said something along the lines of "I hope you continue to live your depressing life with those horrible kids"

I have 2 kids,
So he has obviously bad mouthed me to and my kids? In an attempt to let her know he would leave his life?
He is the kind to talk shit,
In a way I'm pleased because he has been making me feel awful for ending it,
But it hurt to read that, I had a feeling he was disloyal but im so hurt
Do you think ive interpreted it right?
And this was a few nights ago, he is looking for another place but would you tell him what you read?

He is acting like he is hurt, said he is going to kill himself so yeah

If the woman knows he’s with you and you have kids there may be a very good chance she’s just bitter and saying things aimed at your children because he’s not there for his own? But I couldn’t answer it as I’m not him but it doesn’t necessarily mean he’s bad mouthed your children she might just be attacking them and showing her shining personality

You're broken up, what are you hoping to achieve by telling him? It sounds like she was just a pissed off bitter ex and lashing out, doesn't necessarily mean he called your kids horrible.

Either way, he's your ex. Leave him, his ex, and anything they've said to eachother in the past where they belong. You'll achieve nothing by saying "oh also I went through your phone and found X" except giving him more ammunition against you. You'll become the "crazy ex" in his narrative who went through his phone and broke his heart etc etc. Not worth it.

I wouldn't be starting a conversation with him. I think you've probably interpreted it right but if he chats shit why give him the opportunity?
Oh and you know you can ignore the threat to kill himself don't you.

Yes I think it sounds like he's bad mouthed you to her 100% people will say no to not make you feel bad but it's clear from that message he has. Just rise above it though and no don't message him.