Uhm, Trist is really awesome and fun to play, that said she really falls behind in comparison to other adcs when faced against a GOOD tank player, even though you can always simply run away but when it comes to fighting you gotta be really methodical in what you do, her jumps are awesome to get cheeky kills but if the enemy has any immediate CC you need to be super careful...
She's also supposed to be good at taking turrets but honestly this hasn't been the case for the longest time lol, her bomb does help you push buuuut it isn't all that huge difference, a MF with lethality will melt turrets way faster than what tristana will