I don’t know how this is possible. I play sorcerer, my friends play all the other classes. We started on WT2, most of us solo including me. We have had no issue with dying to trash mobs, only needed a few attempts on bosses to get the mechanics right. We did Lilith together, was great fun!
I would recommend checking out a leveling guide for your class, maybe there is some tweaks you can do to improve survivability. I ran a firewall build with hydra as sorcerer, worked really well. Now im all about my Ice Lance build.
I can’t remember when i first started to get decked out with legendary armor, but im pretty sure it was after level 31. I guess they gave you legendary gear earlier in beta to be able to properly test them. You can also make rare items that are good legendary by inserting a legendary effect into them. A few of my pieces that are really good weren’t legendary to begin with.