I hear what you're saying @Luna20 and it sounds like you're heading in the right direction with the handles! But I'd think carefully before adding coving/ceiling roses etc as, imo, these can conjure up the 1980s/90s if not original to the property.
For example, we bought a Georgian cottage in 2024. The previous owner had lived there since 1970 and it was last renovated in 1965. So, sadly both internally and (to a lesser extent) externally, it felt like a much newer house that had been lived in by someone extremely elderly...which, of course, it had. All original doors, architraves, skirting, fireplaces and staircase were no more. The only fireplace was a crazy paved monstrosity!
Every bit of lovely uneven lath and plaster had gone too - replaced by flat grey gypsum. The ceilings - fortunately only artexed in a few rooms - had coving in the main living areas and it's one of the things we're removing as it's just wrong for a low-ceilinged cottage, being more suited to the high-ceilinged Victorian houses we've owned previously. Perhaps it will look better in your house🤞
So, generally speaking, it's been a bit like your situation, in that we're having to add character where none exists. We're doing that in the form of - period doors with brass/black door furniture, high skirting and reeded architraves. Paint-wise we're using deep, saturated, period-appropriate colours (which we love anyway) rather than the 'apple white' etc that was already here. On the (reclaimed) painted kitchen units we found on eBay, we've added solid unlacquered brass knobs/handles which have a lovely characterful look/tactile feel.
We don't like fitted carpets anyway so have loads of antique, vintage (and one crazy blue contemporary shagpile!) rugs, which always bring character to a room, imo. In the kitchen we're fortunate to have original Georgian floorboards which we're waxing, but elsewhere they're narrow 1960s. We're mostly painting those in LG Lamp Black, which we've also used to improve the plain, boring stairs.
Otherwise, loads of interesting art, textiles, plants and stuff you love that gives the place personality will all help draw the eye away from the boxiness of the building itself 😁