With respect what do you expect from bikes sold at these prices?
.......It's impossible to make a bike of any quality for these sums.
That's why I always buy mine secondhand, apart from the fact I only want steel anyway.
Pre-virus, I could choose to spend £100 on a new BSO or not much better than a BSO, or I could buy something high quality used, maybe fit some new Schwalbe tyres, and still have change out of £100 afterwards.
A 30 year old 531 frame on a bike that once cost new the equivalent of £1,000 or more in today's money, is still going to ride like a £1,000+ machine today. OK, you may have to live with a few scratches and scuffs on the paint as it isn't factory fresh, but then I'm not overly precious about mine anyway, barring not wanting them to get nicked or badly bashed up. Once you get to a four digit price point, I really don't believe there is any meaningful gain apart from miniscule weight reductions, from going any higher than that. I'm not pro racing, so paying at least an extra £1k per pound of saved weight, is just extravagant nonsense. I could achieve the same outcome by visiting the toilet or not eating immediately before I go for a ride - or going out with an empty water bottle and only filling it from a graveyard tap when I'm actually thirsty.