Nothing is perfect, but I believe that writers' groups have enough benefits to give them a gold star. There are a variety of groups that offer different benefits.
A. Online critique groups: I have belonged to one for many years, and I know that I am a better writer because of them. When others critique my work, they look objectively and point out things I never see, even when I am editing and revising. Besides improving my writing, the women in my group have become real friends. Where do you find a group like this? Go to your favorite SEO and use keywords like 'online critqiue groups' or 'online writing groups'. There are many different kinds. My group is for women only and open to International writers. It's relatively small, varying with 20-25 members. There are others that are quite large and can probably offern more because of size. Personally, I prefer the smaller size as it is more personal.
B. Local in-person writing groups: Many towns have groups like this. I found one many years ago through my local library. Way back then, a group of older ladies who liked to write met one Sunday afternoon a month. I learned a lot merely by listening to them chat and hearing them read pieces of their work. Now, our community has a few writers' groups that meet face-to-face.
C. State organizations: Most states have a writers organization. I joined mine 26 years ago and have never been sorry. They offered me an opportunity to meet other writers, to attend workshops and an annual convention as well as monthly meetings. When Covid hit, we started having zoom meetings, and they were so well received that they continue to this day. My state is over 400 miles long from east to west border, so the zoom meetings allow everyone to hear guest speakers, attend meetings, and more. Once again, use a search engine to find your own state organization for writers.
D. Other online writing groups: There are other online groups that are not critique based. They offer information for writers, news about submissions, and more.
By joining writing groups, I have connected with a great number of writers. I benefit from their understanding of the writing world, their successes, and their friendship. I have also found that the involved you become in a group, the more benefits you receive.
One word of caution. There are writers who start joining writing groups in person and online to the point that they spend the bulk of their writing time with the groups, which leaves less time for actually writing. I encourage you to find and join a few groups, maybe even narrow it to one or two, but do remember to leave plenty of time to write.