I tried a top of the range Ulefone a few years back.
Amazing spec but the overall package just wasn’t up to scratch. For example, the camera had a big big spec but when it came down to it was pretty rubbish. Eventually, it failed after about 9 months with weird faults from 5 or 6 months.
To me they’re like a kit car with a big engine, big tyres, lightweight, low to the ground, looks the part…. but… Totally outclassed for real life use by an M5 or 911, ie a flagship Samsung or iPhone.
They may gave got better but sometimes you get what you pay for.
For me, the best value quality smartphone is the previous still on sale model from one of the big boys. Think of an s10 now with the s20 out.