Dont worry about it, you had the right attitude in your response, not everyone knows to credit work when they use it.
For me specifically, I dont mind too much if it's reposted as long as you add a link to my account in the post or somewhere that can be easily found
idk about other artists though

As it happens, I am also the one who made the mahoraga artwork of your banner, and the aizen from your pfp is artwork by @ChaiiDamon on twitter
It won't cost you anything to add credit in your bio, so please be mindful of the ones who provide the community with art

I made this, if you're going to repost it anywhere, I ask you to credit me.
This version of the picture has resolution bad enough that my watermark at the bottom right is barely readable.

Oh whoa, I'm in the list

You know how long i been waiting for this?

I got like 50, you're good lmao, you might be washed but that means you're shining goat ✍️🔥