We had a few of those on our fleet, (now defunct UK airline), in around 2006 - ish. We used to call them 'dentists chairs'.
I seem to remember the key was to move the lumbar support forwards - pushing into your back - and adjust it up and down to fit you. Then they were tolerable. But yours do look terrible; better have a word with your union to get them changed. I am sure your airline would not want any future claims for back problems caused by bad pilot seats, if you get my drift.