I just don't have the energy to be strong and fight against all the promises
Of course you do, you're just making excuses now. You know full well all the promises are empty, so they're meaningless. I think you are more than capable of standing up to empty promises that have no weight.
Nobody here (except an abusive person) is going to tell you to stay if that's what you're hoping for.
I feel really sad for you if this is what you think being loved looks like or feels like.
People who love you don't cheat on you, don't disrespect you, don't deliberately hurt you, don't refuse to listen to you, don't manipulate you, don't gaslight you, don't try to inflict pain on you, don't make threats.
Is that how you show love to others?
Ultimately, you have to make a decision. Do you want your life to be painful and toxic forever, or do you want your life to be happy and stable even if it means a temporary period of hurt and healing?
That's down to you. But if you're not prepared to take the steps you need to in order to reach a better life, then nobody here can help you. Nobody can stop him abusing you or stop it damaging you.
Honestly, reading all your posts I think the reason "blocking never works" is because you don't want it to. You don't want to move on and make life better for yourself. You want him to beg, you want to be promised the world (how many worlds does he owe you by now? How many have you received?), you want him to make wild declarations of love that are not supported by his actions and you want an excuse to continue the relationship. You're not trying or meaning to end it.
If you get genuinely wanted to end it and give yourself a real chance of something better, you would not engage with him after ending things. Your decision would be the end of discussion. He would be blocked on everything. You would never speak to him on the phone again. You would never meet in person again. You would never have any contact with him.
If you genuinely want to end it, that's what you do.
Your life sounds shit and miserable. Why don't you feel bad for yourself for living like this or for the future you're throwing away by continuing with this abusive man?!
Look up trauma bonding. Those feelings you describe aren't love, they're the result of abuse.
And then do the Freedom Programme: www.freedomprogramme.co.uk
Then your next relationship can be a happy, healthy one.