Some grammar books suggest that there are 3(-4) possible structures.-> 1st, 2nd and 3rd conditionals. Some add the zero conditional. This is misleading. Any combination is possible.
You usually use past simple + if to talk about the present (or future).
If she were more self-confident,...
(But she is not self-confident.)
You usually use would(n't) have + past participle to talk about something that happened/didn't happen in the past. These things would(n't) have happened, if things were different in the if half of the sentence.
…, she would have coped with the situation then. (But she didn't cope with the situation.)
You usually use would(n't) to talk about something that isn't possible in the present. These things would(n't) happen, if things in the if half of the sentence came true, which isn't possible now.
…, she would cope with the situation. (But she can't cope with the situation now.)
So the following sentence is correct:
If she were more self-confident, she would have coped with the situation then.
= She is not self-confident, therefore she (wasn't able to cope) /didn't cope with the situation.
The following sentence is correct if you leave out then::
If she were more self-confident, she would cope with the situation.
= She is not self-confident, therefore she can't cope with the situation (now).