while you can climb playing any champs you want (up to a certain point), playing a certain thing can sometimes make games easier. like picking something ap if your whole team is ad. not saying you should have played tank, but sometimes picking something more for your team can make it easier.
on to the game: even if you play really well, doesn't mean you will win, and even if you played really badly, doesn't mean you will lose the game either. for this game though, i would say your score isn't too bad. you only died 2 times and had 50% kill participation. you having the warding trinket, i would recommend switching that with sweeper or even blue trinket.
i didn't see you play, so it's hard to comment on anything else besides that. you likely had to snowball the game harder, which isn't always easy. the two deaths might have been able to be avoided. i didn't see this game, so i really don't know when or how you died. i also don't know if you could have pathed better, gotten objectives easier or anything else.