HELP - Molten Strike Juggernaut Build

Hey guys, I wanted to ask: what's wrong with my build? I'm a new player and I'm following a guide that now I realize maybe wasn't suited for new players since it's kinda expensive.

I got to red maps, but I can't for the love of Christ kill any T11+ bosses. I'm still dying for some T10 ones!

Resists are all capped, 5k-ish life, I don't know what else to do.

I don't know if you guys have access to my gear in my profile, let me know.

Any help is very much appreciated!