It's almost three months since my then ex-fiancee of 5y (

It's almost three months since my then ex-fiancee of 5y (we were planing the wedding for May) decided to break up because she "couldn't feel the love anymore, and I wouldn't be able to fill that void".
Then she started playing the blame game with me, I was trying to understand why and she omitted to mention that she got emotionally involved with someone else. She admitted that after hours of talking, where I wouldn't give up because nothing made sense.

As I learned that after hours of blaming myself, so many puzzle pieces started to fit together:
- Like her being happier than ever during the last two months but seeming emotionally unavailable. I attributed it to finally finishing her master's (which caused her a tremendous amount of stress, indirectly, depression, anxiety so on) and finding a new group of on-line friends.

- Her coming home from visiting friends (who turned out not to be her usual friends but "the friend", who took 3h bus to meet her) and sensually kissing me, which hasn't happened in months if not a year (again, depression, SSRIs so on).
Now when I think about this, I just want to puke, because I know that kiss wasn't for me. It was for the guy she was meeting.

- Why she was separating me from her new group of online friends.
I gave up on that because I didn't want to be controlling (and she mentioned that she had controlling exes in the past, in the end, I got called controlling either way because we had Apple location sharing that she initiated, and I was using it to be able to greet her home when she was coming from uni, I work from home).
- Why she was omitting my involvement when telling stories over voice chat to her new online friends.

I missed so many flags, but I just trusted her.
In the end it turns out she was mulling over breaking up with me for 2-3months, playing along at home, keeping the routine.

Now, 3 months after all that, I'm happy she is gone. Looking back at our relationship, I was enabling a spoiled, self-centred woman-child who was dealing with an endless stream of mental issues. Our bedroom was dead for 2yrs due to psychosomatic issues of hers, on which she was working but not really (going to a private physio but not doing assigned exercises at home). I was the breadwinner, the cook, the maid.
She got me to sign her up to 20h weekend cooking class, so she can gain confidence in the kitchen, the class was 3 months in the future, no topic of cooking for 3 months.
Out of that cooking class, over a period of two years, she prepared one dinner, mostly because I was working late on valentines and I didn't give her much of a choice.
The further I look, the more manipulations I notice. I'm glad she is out of my life. I should have broken that up earlier, but I was blind.

I probably wasn't perfect in that relationship either, I have a tendency to work late (working across timezone) and go to bed early in the morning (which I know was an issue for her). I continued to vape even though she didn't like that. I can sometimes be distant but I always tried to be available to her.

Sorry for a long post, I just needed to get it out of my chest. I don't think I told a large portion of the whole picture to anyone, just fragments here and there.