How can i improve my character

[FullCaster]

I'm curious as to how you determined he made his character worse as we have virtually no information.

ok I will rephrase it, mechanically worse. Also there is info in the original post if you would care to read it.

 

[PnPgamer]

You misunderstood what I said. I didn't say being a Barbarian was the problem. The problem is he made his barbarian worse by mixing in 3 levels of Warlock.

Ah gotcha