Headphones being good or bad is all about taste. Like for example: i love Vanilla icecream with strawberry chunks, to you that might be crap, same for headphones.
Some love their phones with solid state amps, some with tube amps, some say no amp does anything to sound...some think their AKG K701 has bass.....
Any headphone you have, if you use them and kick back with some good music, likely you will start to enjoy them....
Based on budget, you may "rent" headphones. Buy something, try it, and sell it when something else comes along, the difference between what you bought and what you sell it for is your rental fee.
I bought AD700 and later D1001 to get an idea of what kind of sound i like open vs closed. based on that experience i bought some HD600, but from time to time i have my D1001 on the tube amp and go "Why did i buy the HD600 again? This sounds great?" of course, once i plug the HD600 back in to listen to music, i remember why, it doesn't really make the D1001+LD combo sound bad, just different, and it mostly comes down to open vs closed to me. Preferring open phones..
With all the reviews contradicting each other, look for personal taste comments, what they say they like and dislike, then the comments start to become "relatable".