Originally Posted by
J. D. Guy
You're conflating some things, namely the "delinquent phase" (which I feel is always exaggerated, in length, appropriateness, and/or severity whenever Wallace comes into the conversation), as that happened only during his earliest New 52 appearances, which Joshua Williamson did not write (Williamson only began writing Flash when Rebirth began). Even during New 52, that wasn't a big part of his character (and what was there was justified by circumstances), because most of Wally/Wallace's use then was spent having him bond with Barry (baseball game moment was nice), having him come to admire The Flash, and seeing him take up an interest in engineering/automotive engineering (which hasn't been brought up since Rebirth, unfortunately, since he's been too busy being Kid Flash and dealing with Superhero/Supervillain drama).
Also, I definitely feel you're overplaying Wallace's negativity towards Barry, to the point where you're summing it up as "whiny", and underplaying why he should be and was justified for having that negativity towards Barry (since Barry's lack of forthcoming-ness was a repeat offense, even when Wallace tries to give Barry another chance).
Lastly, while it might not have been your cup of tea, whenever Williamson does use Kid Flash/Wallace, I've always loved it. I still cite the moment when Kid Flash learns his villainous Uncle Daniel, who had managed to be a surprising recurrent during his young life before he went to prison and got his powers, was actually his father, who is now dead, to be a superb emotional moment for the character. That was their first falling-out, and was also when Flash reveals his identity; but too little too late. That was beautiful, in my opinion. My only real problem with Williamson writing Wallace has always been that he wouldn't write him on a consistent basis throughout each passing arc; that is, he would often be Put on a Bus whenever Williamson wanted Barry alone. Part of it may have been/may be outward forces (Teen Titans/Deathstroke), while other parts may be deliberate writing choices. But that's about it; when Williamson does write Wallace, it tends to be awesome, fun, or wonderfully emotional.