Im 5’10 and 195. Titan Super Centurion size 40. The straps I know how to tighten those, but not sure on hips or leg openings. The legs seem to ride up alot more then when new. I can get the suit on in 2min easy.
I always took a marker and pinched and marked the sport where I wanted them taken in. I would also measure how much to be taken out of each hip. I would do that first, then come back and do the legs after you made the first adjustments.
Clearly much too loose. I’d take it to a tailor to have it worked on. Pinching straps I’d be comfortable doing myself, but taking the legs/hips in I wouldn’t do myself.
Be sure to explain how strong the seam needs to be. Looks don’t matter, just needs to be strong!