Your first mistake was picking Jhin in Solo que.
Solo que means you have to solo the enemy team on your own.
The best picks for this at the moment would be
Cait (has amazing siege and escape. The best solo que ADC to carry with at the moment)
Lucian (has escape and a good ult more of a caster style)
MF (Has very high movement speed and her ult is a game changer but a much harder pick to master)
Okay picks
Ez (very good mobility but lacks damage and is weak in the laning phase)
Jinx (fantastic damage. Lacks mobility but has her traps and slow but well worth if you get good at stutter stepping)
Corki (very hard to master but has great mobility and damage)
Tristana (has awesome mobility and siege but lacks damage compared to cait)
If you feel your team is somewhat reliable
Sivir (her ult with a good team is a game changer)
If you have a lulu or janna support. Two tanks with peel and a mid with CC.
Kogmaw (become the juggermaw)
If you are stuck going mid and you main ADC
Varus (stay mid lane and push your tower down first use your AA's to harass)
If you have mad skills with stutter stepping
Ashe(has a stun! will win any 1v1 verse a squishy if she lands her stun)
the worst SOLO que picks would be
Kalista(lacks damage and range)
Vayne(lacks range and skill cap to high)
Jhin(lacks mobility and attack speed)
Twitch(requires specific team comp)
Quinn(doesn't fit the meta)
Urgot(needs a rework)
Draven(axes make him to predictable so he becomes useless at higher Elos)
Now some of the champs that are bad at solo que are not bad champs they just require either very high skill or specific team coordination to work which you will not find often enough to be stable in solo que.