very unsafe feeling behind the wheel

Here we have the kind of tire that I will never buy for my car.
Just a week ago I went with a company car (Opel Astra SW 1999) to a tire center to change the old and worn Bridgestones with the intention of ensuring my safety, but after driving the car in normal road and highway I felt like having my old tires again.
The first filling was a lighter wheel. then when tested on the road in a straight line the car dance like a ballerina and wen exit a corner feels a big delay on straightening the back. I even thought it could be lack of pressure, then I stop at a service station and check that the tires have 2.7 bar unlike the 2.3 bar that I normally put in the old tires to had a very steady driving. So I cannot recommend this tires if you like to feel in control of your car. And are also a bit noisy.