Imo, teemo is more of an annoyance than threat.
Unless teemo hard counters you, he is just annoying. For the most part, he'sa bad champion but I wouldn't say troll pick unless you're old tyler1 and much so in higher elos that he needs to build tank so he doesn't feed. I also can see him as an anti splitpush champion. Most splitpushers are as reliant and the blind is annoying.unless he gets super far ahead, he doesn't really do much. Also don't believe me when I say he's bad??? Teemo mains tend to play the game for fun and not to win the game and not trollpick. If he were good, the optimal build would be hybrid.the reason it's seen in low elo is because nobody is good.