My website is going down..

Can anyone help me understand why my website is going down from google ? and a lot of backlinks are dying...

Backlinks will always be dying, you need to find a linkbuilding speed that gives you a general link increase.

If the website is going down you probably have a wrong setup of campaigns or too much keyword in anchor text.

Backlinks drop organically, you need to be building at a reasonable rate and constantly.
You need to find a strategy that works in your text, don't dilute your linking profile and pay attention to what your settings are.