Old and broken champions

Ok so as everyone knows there are some champions that are still old and need reworks and changes but i really cant tolerate how some of them are super broken and the worst part is its usually the easiest ones that are broken, example . I dont have anything against zoe and yasuo i can tolerate because he at least needs some skill but mundo on other side is just unkillable and deals way to much damage for a tank AND for how easy he is, im not saying easy champions should be nerfed to the point where anyone with more complex champion but skilled could take them no problem but they just shouldnt be able to burst someone and survive 10000000 turret hits while doing so. Some champions that i also think deal way to much damage for how tanky they are are and and look at the coincidence its 2 really easy champions to play again. i honestly think they should get some major nerfs, right now i see garens who are just as tanky as me with 3 damage items ( infinity edge mostly ) and cho gaths who win almost every matchup because they are immune to poke with the constant heals. Its really unrewarding for people who go with some more complex tanks because even when mastered they cant do as much ( some examples )