I think you should not just give it up (that's a big decision in terms of health implications) but you would really benefit from seeing someone privately who specialises in complex cases - like a menopause clinic. You can do a video call with the Newson Clinic, you don't need to leave the house - they mail you any medications. So if you can afford it, that would be a good idea... They can write back to your GP and advise what to continue, so you don't need to stay private if you don't want to.
IN terms of them telling you that you should be through menopause soon so to stick with what you are taking....
Menopause is a life-long condition until death do you part from this earth. You're not going to be 'through' it. As soon as you stop taking HRT, you will very likely get low estrogen symptoms back and even if you're symptom-free and lucky, you will still have increased risk of dementia, heart disease, osteoporosis and more besides, without hormones. So you need to be thinking about it as a long-term thing and an ongoing plan...
You were okay (with endo and bleeding) on 50mcg estrogen and the combined patch. Then you got some low estrogen symptoms back (hot flushes, headaches etc), so your GP was right to increase your estrogen - but going from 50mcg to 100 is a big jump. What about 75mcg? You shouldn't be on more estrogen than you need to be on. It will cause more bleeding and is an endo risk factor.
Did you try 75mcg of estrogen? If not, ask to trial reducing your patches to 75.
Then, your GP also changed your progesterone from the one in the combined patch to utrogestan. If you were fine with the progestin in the combined patch but not with utrogestan, then you could go back to the combined patch - preferably the continuous version of it, with a break for a few days to allow a bleed if needed. And add in one pump of gel, which would take you to 75 of estrogen. You can add in extra progestin by way of desogestrel too - because the amount of progestin in the combined patch is intended for 50mcg of estrogen, so if you are adding a pump of gel, you may also need to increase progestin. (And that might be necessary for endo anyway.)
By the way, desogestrel is available over the counter in pharmacies now without prescription, so it's something you can just go and buy and try any time. Even now, on the combination you're currently on, you can add in desogestrel. It is used by women on HRT as a contraceptive, because HRT doesn't do that.... It stops bleeding eventually. The bleeding becomes dark and slow and brown and then just stops.
If you don't feel confident enough to work out what you need and request it or to try things like this, these are the complicated combinations of things which you need someone knowledgeable and experienced in HRT to work out and trial with you. That's why it would be best to see a specialist.