Many women on our threads have lost weight - and maintained for 2years+.
I suggest you try 5:2 and see how you get on. You are welcome on the main 5:2 / IF Thread #57
We're a very friendly bunch.

No single diet suits everyone; the best one for you depends on your lifestyle, insulin metabolism, other hormonal factors, food preferences etc
wrt 5:2, or other forms of intermittent fasting:
. NOT for anyone with past or present EDs
. If you became overweight by eating a lot more calories than your body can burn, then your "natural" eating is way above TDEE.
So, you'd have to mfp to train yourself about portion size on NFDs, which you would also need for maintenance, anyway.
. If your natural eating is not much above TDEE, 5:2 is easy and no need to count.
. For many, fasting is like a reset button which enables them to eat more sensibly on NFDs, especially if they have a lot to lose.
Some others find fasting helps to do this gradually over the months.
For a few, it just never clicks.
Men usually lose more easily than women on any diet, because they have a higher TDEE, far more muscle, far fewer hormonal swings and hormonal problems affecting fat-burning.
Those who find it most difficult on any diet are short, menopausal, sedentary women, especially those with PCOS, insulin resistance, thyroid issues.
Losing weight almost always requires a calorie deficit, which is much more difficult to achieve for such women, who have very low TDEEs
For some couples, the woman may have a 1500 TDEE, the man 3000 TDEE. It is very difficult to eat half the amount your OH is tucking into. Divorce / murder
Women have far more alpha receptors (resisting fat-burning) compared to beta receptors (much easier to burn fat) in their stubborn fat areas.
So, trimming the last stone is more difficult on any diet.