It may get better. It may not. Honestly it all really depends, both on the work you put in AND external/random circumstances.
You don't know what the future holds, that's the truth. Your brain might be convincing you that you can forsee the future, for example that if your life always kept getting worse - it will get worse. But in reality there's no rule like this. Human minds have systems of predicting what will happen but they are *not* perfect and only operate on very limited data.
The only way to really find out if it gets better is to keep living and trying, as long as you have any, even a small reason for that. There are people who got out of a very dark place, some of these stories are on this forum (..but mostly the people who get better just leave this place and you never hear about them again, because they're busy living their lives), so it's usually possible, but there is no general rule.