Just a very basic suggestion, but maybe try messing with your monitor color settings, as well as the in-game color settings to see if you can make it more visible.

I used a Hand Cannon all of D1, and same thing in D2 and honestly I don't think I even notice the reticle anymore. It feels more like Muscle Memory when I aim a Hand Cannon. There was some adjustment when D2 came out, mostly because Hand Cannon's handling dosen't feel as snappy as it did in D1. As for Recoil once again I think I am just used to it, almost like the recoil is a metronome. It's how I pace my shots and once you know how the gun will go back to zero center you are already adjusting your aim before hand. It's why in D1 I prefered the Eyasluna over the Palindrome. The Palindromes recoil was mostly up and down, while the Luna's was Up and to the Right. In D2 that is also why I don't like the Ikelos Hand Cannon, the recoil feels to much like a Side Arms.

West of Sunfall 7 had that problem before the bug that changed the animation. Its vertical recoil would look like my character arms were moving up and down, not the barrel of the gun. Personally I just try not to think about the ADS point and focus more on looking past my gun to the target. Kind of like driving a car - don't look at the two lines on either side of your car directly in front of you, look down the road to where you're going. It all depends on when you left D1. If it was during the Thorn/The Last Word meta, shooting a gun now will feel very squirrely. The bloom mechanic was added to un-meta handcannons. The best explanation I've heard of the logic behind that decision is that when you have 4 shots to take down an opponent vs 20 on an auto-rifle, the HC accomplishes the kill goal more efficiently. Shooting a moving target with an auto rifle will lower your chances of landing all head or body shots across the full magazine, a HC will have a higher reward if you land all 4 shots while someone is strafing or going into cover. Example: An enemy is running behind cover and will run out of cover during your engagement. While running to cover, you land 3/4 hand cannon shots to take down your opponent. The opponent exits the cover (no health regen) and you land the 4th to finish them. Auto Rifle scenario: ideally you would need to hand 15/20 shots to have the same equivalency, then 5 shots when the opponent exits cover. However you have more opportunities to miss and you only land 11/20 shots. now you have to do more work than the HC to finish your opponent when they exit cover. The bloom mechanic was there to make HC's less consistent. The faster you spam the trigger, the less accurate the gun becomes. This was like adding RNG to your shots so not all 4 will land every time with aim assist. Ghost bullets as they're called. The only HC that I've used in D2 that feels like a D1 HC is the IKELOS. I have a theory that they're piloting the fall meta based on data from that gun.

That's not how you spell it man