The thing that really changes everything is asking your questions differently. Instead of "clean your room," you can say "I'd like to talk to you about your room" or "how could we organize this together?" It's a stupid piece of advice but it works because you're not giving them the feeling that something's being forced on them from above. At 14, teens become hypersensitive to anything that looks like dumb authority. It's normal, it's not a crisis - it's just their brain rebuilding itself. But because of that you have to adapt how you communicate.
The other important thing is stopping before it gets too heated. Like when you feel the tension rising, you say "listen, we're going to drop this for now, we'll talk about it later" and you actually leave. Not "you're going to listen" as a last word. Yelling on both sides, that's normal in the moment but it just reinforces the cycle. Once they're calmed down, you can actually talk without it being a fight.
Also try to figure out why they're reacting that way about certain things. Sometimes it's not the request itself, it's that they don't feel heard elsewhere or they get the feeling that they're always the one being criticized. No need to psychoanalyze them, just listen without judging when they talk. "I see you think that's unfair" - that does a lot of good at that age.