Zyra, Brand, Lux, and Vel bot lane is a serious problem
When the only way to play against a champion is to not play against them there is a serious balance issue.
: You litteraly will get poked to death vs a zrya. She places plants behind your minion wave and they just auto attack you. She is actually more of a disqusting version of 
: Why was this guy ever allowed to be in the bot lane. This guy offers no utility whatsoever except a stun and then you die. Brand is just a terrible design alltogether because even if you build Mr he still does % health damage which is terrible in general.
Another champion who will just poke you to death and there is nothing you can do about it
Absurd range and true damage as well as a cc.
Get these guys out of bot lane. Period. When your support is building like this
then clearly there is a problem.
You dont see
being a problem int he bot lane because she actually requires gold to do damage
These other champions however have such high base damage that they are problematic as supports.
All of them are extremely weak against ganks. Communicate with your jungler. If they poke, they are pushing.