omega mv6 temperature drives me into madness

good day I’m new here and need urgent help have bought me an omega mv6 bj 95 my problem is that constantly the temperature is too high for example car ride with 120 kmh and temp goes to 100 degrees if I would drive even faster still higher in the city it lies at cirka 95 degrees fan work all no water loss thermostat is new and the cooler should not be too long in fact is a longer highway track with high speed is impossible please h Eleventh for me