Curious How You Deal With a Definite Loss

Title. Other ADCs have avenues to regain power if they, for whatever reason, have an unlucky early game. Champs like Caitlyn, Jinx, and Jhin all have long-range poke to KS and come back if they fall behind. I know this for a fact as I mained Jhin before Samira and was never worried if I lost lane, had a bad support, etc. Champs like Sivir, Vayne, and Kog'maw scale very well with pure farm. Champs like Ez, Lucian, and Tristana have escapes which allow them to avoid feeding in the first place, or to KS and escape unscathed.

Samira doesn't have those benefits. She gets kills by overpowering opponents during all-ins and has no avenue to net kills otherwise. She also has no escapes. In other words, when she falls behind, she still has to throw herself in the middle of a teamfight while underleveled or underitemized just to get a potential kill and come back. Very different than a traditional ADC who can AA from safety and use their ult or other skills to KS when necessary.

This creates a situation where Samira is basically a super minion if she loses lane. There is no room for failure. But because she doesn't scale well with pure farm, like some other ADCs, she can't get away with just splitpushing.

My question is what you guys do when you clearly can no longer contribute to the game, the rest of the team is behind, but they decide to hold everyone hostage and refuse to surrender. Are there items you buy? Do you just splitpush? I'm curious