What happened to me ( I was charting my cycles ) was that I seemed to go through all the motions of ovulation (cervical mucus etc), then nothing would happen, there was no temperature rise (therefore no progesterone, as that is what it is measuring) or there was some half-hearted ovulation going on then 'whoosh' - a 'period' just a week later. This was probably 'oestrogen withdrawal bleed' where the oestrogen levels have dropped suddenly. As time went on, there was less definable ovulation-type stuff going on and even more random 'periods'.
I suppose you could call it 'oestrogen dominance' if you want, as there was very little progesterone happening. I expect some people may have a problems with over-production of oestrogen during this time, but things work on feedback loops so once your oestrogen levels have risen to the required amount for a few days and nothing happens, they stop. I do not have hot flush problems, but I was getting huge uro-genital problems due to low oestrogen. Cyclical hrt sorted it immediately for me.
You do need progesterone in the second half of your cycle, if you are producing oestrogen in the first half. It changes the lining so that it is more receptive to a fertilised ovum, but also the structure changes so that it comes away properly and all together when you have your period. If you are not producing enough, then bits break off when it thickens too much, and causes bleeding, which heals, until another bit breaks off. The blood vessels do not spasm properly to stop the bleeding. This is why things like Mirena can be helpful in perimenopause.
Articles about oestrogen dominance get all 'wafty' and talk about 'balancing' and 'oppposing' but really, you just need enough of each to do the job properly.
Some women are better with more progesterone as it can be sedating (think calm pregnancy) and some women can't tolerate it (think pmt). No one size fits all.