Don't go peddling back now, Methen! It may feel like baby steps but they look like a massive leap forward from where I'm sitting, just the way in which you're now speaking about your body in contrast to how you first described it is a world of difference and it's really encouraging to see you see the positive rather than focusing on the negatives.
I do need to hurry with a reply actually as the answer to jean issues is Yoox and their 35% off a selection expires midnight tonight and that should help as some of the listed below models are among them. I think jeans are worth spending a bit more on if you wear them regularly, I've had some good buys on the high street but then they're gone the next season or a completely different fabric and if you're in the smaller waist wider hips category you're usually buying something with a high stretch content so they wear out within a year which is both wasteful and costly. Designer denim usually has a better fit (if you find the brands that work for you) and a better choice of fabric. If you know exactly which models and fabrics suit you best you can go bargain hunting on ebay (I usually set up really specific searches) to get backups but Yoox is my first port of call. Unfortunately, they don't mention the brand model names so it can be a bit of a guessing game sometimes, although I've also discovered new fits that way.
Flares, my top brand (I'm listing multiple names for brands as Yoox sometimes lists them separately) picks for those are:
-AG Jeans/Adriano Goldschmidt (TTS more or else, possibly size down one) usually start at 130 euros and drop down to under 50
-M.I.H. Jeans/MIH - specifically The Marrakesh and The Casablanca version of it if you're petite (depending on fabric TTS or size up one) usually start around a 100 euros and I purchase when they get near 60 or below
-Paige Premium Denim/Paige Denim/Paige - specifically the High Rise Bell Canyon (American sizing so best to size down) usually start high at 180 euros but drop down to under 70 quite quickly, I tend to buy under 55.
-The Seafarer/Seafarer - specifically the Penelope (easy to spot by the pockets and slight flare. (TTS) start around 120 euros and drop to around 60 and with the discount are picked up between 30-40
My favourite of the lot and coincidentally the easiest to score on the cheap, The Seafarer Penelope (I purchased 3 the other night for under a 120 euros which would buy me half one at full RRP. Unlikely to be keeping them all, two are the trusted Penelopes but different colours and one's a new model to me, a kick flare). The Seafarer jeans has a bit of an interesting heritage, they're the ones that started the flare trend way back when, it had something to do with the Italian navy and surplus but I've forgotten the full length of it, but they're the exact same model Jane Birkin, Farah Fawcett, and Jackie O were sporting in the 70s. It's altered slightly for a more modern look when the brand was relaunched a few years back. The Marrakesh from MIH came to prominence before that relaunch and at the time was credited as a direct inspiration of The Seafarer originals. I slightly prefer The Seafarer though, it's also made in Italy with Italian fabric whereas MIH are usually made in Turkey.
If you look at the modeling pics on Yoox you'll also that these flares do that thing I described at the waist that dips low in the middle giving that flattering v shape rather than cutting you off horizontally quite bluntly.