Having been there several times (and partly there now) this really sucks. I know its hard to see but there are LOTS of people that really do care I know that for a fact. The problem partly is that many of us are broke/crazy so its hard to offer tangleable help that you can 'put in the bank' so to speak.
Good therapy definitely helps this sort of thing. But its a two way street, you have to belivie that it can work. If you think you can or you think you cant... your right.
We have to unlearn the built in self-doubt , automatic negativity and cognitive distortions. Have to learn to love yourself and not judge yourself, just observe, be kind to yourself. You deserve it. Why? Because you do! Its up to us to value ouselves first. Which can be very hard to learn after a lifetime of self dislike/low self worth.
DBT/CBT is really helpful but you have to do it. The easiest way to do it (the best would be classes but many of us just wont do that) is self-learning apps. Headspace is the one that has had lots if research backing it up but is also the most expensive. 'Aware' is (mostly) free , Clam is the one Im going throuh right now mainly because I like the womans voice but only the part Im doing is free. All of these have good stuff for sleep too.
CBT workbooks have lots of research showing real success with self esteem / depression but they are work. Google CBT Workbook there are tons of options.
Anyhow as always I wish there was a teleporter. Damn geography gets in the way of a lot of life. You can get through this. *hugs*