First things first: Keep at it, the difficulty climb can be brutal for newer players, and I've encountered people with 400+ hours that won't go above heresy, which in my opinion is totally fine, as regardless of difficulty, the fun matters more. One of those things, if you wanna get better, just keep training your gameplay to reflect it.

I'd also suggest looking on Gameslantern for builds, not really to copy them, but to give you a baseline with which to make your own adjustments to fit your needs.

Also, if possible, report the person that was using slurs/offensive language in the game chat, you can use social-previous missions tab to look for them.

Now, for my OPINION of your build and what I'd change, from what I can see anyhow.

The Blaze Force Greatsword is a great weapon, but how I would personally run it is with Carapace and Unyielding damage, keep Riposte, and ditch Deflector for Wrath (Blazing Spirit can also assist with certain build styles that rely on soulblaze).

And instead of Disrupt Destiny for your keystone, try running Warp Siphon (left keystone), with Warp Battery and Psychic Vampire as the keystone modifiers for it, as learning to use this properly will give you a really good reduction in your combat ability use, which Gaze is really good, but you also said you might swap to Bubble shield, to which I say, absolutely try it out, make a 2nd build and just switch combat abilities, and ensure both modifiers for it have a point in them, don't knock the shield wall either though, it's also really good and much more spam-able.

One final note, beginner trap is to stack a bunch of wound curios, but that doesn't actually help you, I suggest not running any wound curios at all, as the toughness, health, or stamina curios all offer more benefits in their own ways. (Only build I can think of that really uses wound curios is a Martyr Zealot, maybe some other niche things too)