is it just me?

just you

It's because there is no diversity. You either pick someone that has really high ratios/attack speed or you lose lane and the game. Doesn't help that there seems to be more and more trolls/summoners that feed and dont stop running in the 1v5 scenario.

Depends, for what reasons are you tired of the game?

idk ive been playing a lot of arams recently. But i am bored of playing after a game or 2. I like urf because i played literally every champion that i owned. if they made a game mode like poro dodgeball where u play as a poro and when u get hit u have to respawn after x hits that would be fun as shit. but there is hardly any new good game modes.