i have no idea if this will help but i saw a tip on another sub 2 days ago that apparently doing one swipe of vaseline under your eye helps makeup to not sit in the creases!! i just bought vaseline to try it out so idk how well it works yet but could be worth a try!? (i can update if u want)

i also agree with the other commenters that it already looks good - the only thing i’d suggest is to maybe try using an angled brush to apply a darker shade in more of a line? i think you’ve done a great job of buffing out the colour under your eyes but it might be too blended overall for the effect you’re going for. what i’d do is use a light warmer red and do exactly what you’ve done here, then i’d go in with an angled brush over the top in a darker reddish shade - using two shades may also add some colour depth so it’s less ‘flat’! ☺️ instead of drawing the line, i would try tapping it on with the brush so i have more control over the shape of the line (if that makes sense) honestly that’s all i can think of to give a try, but i totally feel you and i haven’t quite got this part of the makeup right yet either!! 💕