Usually yes. Not specifically romance-only scenes, there romance is set into a wider story, but usually the characters I write about are heavily and canon reliant on the other character I ship them with (Kirk/Spock example) so, since I consider them as a couple, it's hard to not "fall" into "shipping".
I do try with gen or non-romance from time to time, but it's rare. Any (AU)Warren story I came up with so far, usually revolve around his romance with (AU)Betsy. She usually comes later into the story, and Warren gets his own share of life, but Betsy eventually makes her way into his life.
I understand this. There's a meme going around in the fanworks fandom, which is basically that the more you like a character the more you want for them to suffer so you usually write fanfics in which they suffer.
I admit I'm torn about this. On one side I agree with you, and if he was given more attention (=if he headed a solo title), it would've been perfect for him to have that baggage to carry. For as much as X-Factor treated Warren right post his Apocalypse manipulation, we could've been give much more about what he thought about his changes and how he felt about Candy.
With hindsight, with all the sh*it Warren got since he moved on from Candy, I think at least closure with Candy is necessary: he already got too much baggage to add even Candy's death. Of which he still can fault himself (he has been the one to drag Cameron in X-Factor). He's not his fault if Cameron was ape-crazy, psycho (and possibly love-obsessive), but Warren would have any reason to believe
he was the reason why Candy was tortured and killed. Phalanx!Candy at least lessened that weight by reassuring Warren that she didn't die hating on him - but a part of Warren will forever feel bad for Candy becoming collateral victim of Hodge's war against him.
IDK if what I said make sense.