The chimera boss stalls too much in his fight, very unfun

Rage post. This boss flies away way too frequently making the fight take soo much longer than I feel it should. This fight takes at least double the time because of all the flying away (and the flying fire breath move). Had my first genuine rage moment right now when I died at the last 10% of his health when most of the fight i couldnt even damage him. I think the frequency of the flight-moves needs to be toned down or his max health be nerfed to shorten this fight because right now it is just not fun