in general, marriage counseling or therapy can either help or hurt.
it really depends on both parties.
quite often, one or both parties will enter into counseling or therapy with the idea that it will fix the other person. its easy to fall into that trap. "my partner isnt hearing me, surely someone skilled will finally hear me and tell my partner how wrong they are".
if you approach marriage counseling in this fashion, full stop, it will fail. even with the best counselor on the planet.
what marriage counseling or therapy exists for is for you and your partner to hear each other, and really, truly take in where each of you are coming from, and then to learn strategies, tools, to better communicate, work to get on the same page, and begin to resolve conflict in healthier ways.
The predictable cycle from my OH so far has been calm moments - rising tension- outburst - I defend myself - she gets angrier - she denies it- then blames me.
this is the conflict style between the two of you. if it persists, if it doesnt change, things are going to get worse.
marriage counseling is designed for the two of you to take on board criticism and advice that will help you both break the cycle and move to a healthier trajectory.