Logo

The logo on the left has many pixelated lines, this is especially annoying near the red parts.
On the top left side of the logo, the two grey fragments are closer to the center than the red/pink ones.
The text's white blur leaves to be desired, same for the font of the "hacking to the core" text.

If you want to improve further, you need to be careful about shapes and you must put additional effort into details.
Right about that, tools like alpha selections aren't great to cut something that needs to be well defined and exposed, like for any logo, i think that's how those overly sharp or thin lines happened.

When i have to do such works, instead than making one layer with the shape i need then alpha selecting it, i usually make a second layer where i fill the selection i need with any color, then i make the layer invisible.
Basically a poor man's mask.

Looks great, keep up the work! IV2B is the person you wanna ask for GFX tips
Good Luck on any next projects

I noticed a few things,
All the letters in HaxCore are sharp and idk, unfocused?
And in the logo, the left side of the H seems kinda blank. I'd extend the gradient a little.

IV2B pretty much said everything else.

I guess it's a little better than what you usually put out, but still needs work. You're getting better at taking advice and not flipping your shit. Not sure what's going on with that huge black blob shadow though.