I have a level 50 Barbarian with attack of 1226, armor of 4103, and life of 1546 and I still cant beat Lilith on xbox series x console act 1, this game is getting to be a joke where you can not advance what so ever, I think this is my 30th time trying to beat act 1 and it is impossible unless i get my barbarian to level 100 then I just might have a slim chance, this is on xbox console, I give up to much wasted time in a game that has impossible content to beat to get past the 1st act, I have
Scowling tormentor rare helm 572+15 item power
Nobel anvil rare chest 571+15 power
Weapon masters archon gauntlets 584+15 power
Corpse greaves 551 power+15
Loath runners 559+10 power
Grand bounty rare mace 547+15 power
Cleave eye swear 577 power
Fiend judge mace 570 power
War chest of berserk ripping legendary pole arm 577+20 power
Crupption loop ring 573 power
Loyal symbol rare ring 551 power
Relentless berserkers amulet 555 power
And it is still impossible to beat Lilith in 1st act, guess I will not get mount that I paid for in ultimate edition of this game
What skills are you using?
Which affixes are you prioritizing?
Which aspects are you using?
What’s your strength at?
When you hover the cursor over your armor how much is the %vs your level?
How are you applying vulnerable?
How are you giving yourself unstoppable?
I am on xbox console
Y=iron maelstrom
RB=death low rank 5
LT=Flay rank 5
RT=Rend rank 1
A=lunging strike rank 5
x-whirlwind
Strength is 316
Not sure what you mean on aspects
Armor without potions is 3768
Attack power is 1399
Life is 1394
I have 5 level 40 emeralds in my armor and weapons which it said online that is the best gem to use for barbarians
Aspects are what turn a yellow item into an orange item. They have various effects, such as needleflare spread thorns damage. You want to use aspect that work well with your skills.
Now right off the bat you are using two basic skills, flay and lunge. Unless you are trying for a walking arseanal build pick just one basic. I’d stick to lunging strike unless you want a bleed build.
Next, you are using 2 core skills. Again, try and stick to just one. If you want to do a bleed build dump whirlwind and go all in on rend. Or drop the points in rend if you drop flay over lunge.
Now, you have no defensive skills. However you have just opened up two skill slots. I am a huge fan of iron skin with the aspect of iron warrior. It will give you a barrier, heal, and unstoppable on a 10 second cool down. It’s great. Another defensive skills would be good, but you might also consider some utility from one of the shouts, or chain/kick to apply vulnerable.
Finally, deathblow is great. Keep it if you want, unless you go all in on bleed then swap it for rupture. Either way try and find a weapon master aspect. It will give you another charge of deathblow/rupture.
Make sure you have a way to inflict vulnerable. Chains can do it nicely, and works great to bring things in to smash with a deathblow. Kick is another way to do it.
Getting crits with lunging strike can set you berserk, but look for a way to have berserk up more often.
Finally, your affixes are very important. Try and get a big +str and +vulnerable both your two handers to start. Try and get +armor on helm/chest/boots. Try and fit in some + health on rings/helm/chest. Try and get whatever core you use on your gloves, and +crit chance. Be sure to get damage resist close and damage resist far on your pants.
And finally, make sure to upgrade your equipment as high as possible.
It sounds like my experience playing d3 check out maxrollgg their guides are the best! I’ve leveled both Druid and Barb to 85ish which are the worst classes to level and their guides made it way easier! You don’t have to follow it to a tee but the skills and guidelines help so much!
Your skill bar alone says you are completely clueless 
Unholy mama Lilith why would you run 2 basic attacks