That moment when Teemo isn't counted as one of the cancerous champs.
Anyways, every champ and player can do poorly. And I would like to note that Jhin and Blitz in general seemed to be above everyone else in that game (Jhin haven't died once in the entire game).
Also, I doubt it happens every game, since Teemo:
- Has a slightly below 10% pickrate
- Has solid 50% winrate (in lower elos, gets lower in Diamond+)
You might've had a bit of bad luck with Teemos, that's all there is to it (or maybe you flamed them for their pick? Flaming people makes them perform worse).
That said - you can ban Teemo if you so desire. But keep in mind that players that got their pick banned from them by a teammate are angry, prone to trolling and also they can't pick their best, so your call.
If you don't want Teemo in your team, I'd advise you to try and talk them out of him - using serious sounding words like: "I know you are good with him, but he doesn't fit our team composition" etc.
PS. I don't like his build at all - coming from a Teemo main as well.