I mean, I get a lot of groans from my friends who are more experienced players when I use him

even though I usually get a fairly decent K/D and on more than one occaision I've backdoored him to win a game. (the most recent time I was on the 3 side of a 3v5 match because two of our players quit at the beginning)

he's obviously rather squishy but aside from that...

do edumacate me

I can't quite be sure why people hate him... I have a number of reasons why, though.

• On-hit Teemo is an easy way for even relatively inexperienced players to make something resembling a powerful AD Carry.
• Teemo's E give him very irritating level-1 pokes, making his enemies have to burn through their starting healing potions quicker than they'd like.
• His Q can be VERY annoying to opposing ADs, especially since the appearance of the blind particle (a bit of black smoke) isn't quite as obvious so it's possible you'd be blinded and not notice.
• Thanks to his W, (As well as his ult) he's one of the champions it's very, very hard to catch when they decide they're running away.
• His ult is very, very powerful, especially at lower skill ranks where a team can't quite afford the 400 gold per death (Both due to lower farm as well as higher death rates) on someone to make a dedicated sweeper.
• Oh, and his ult can be used to aid his retreat, in the middle of battle, or can be used to semi-ward (and defend) bushes... And make turret-diving against him very painful. Oh, and did I mention how irksome it is to just be dashing to a lane to push back a wave of minions when BOOM, you hit a 'shroom?
• Additonally, that stealth passive of his. It's annoying to enemies (where he can gain just enough distance in a chase to hide until someone else comes to counter-gank) as well as, well, his friends: http://www.youtube.com/watch?v=teVtlW6_rho
• Also, being that he's a little mouse-badger-thing that's tiny and perpetually has an anime "^_^" face is probably irksome too.

After you will have stepped on a fed teemo's mushroom once, you'll understand why everyone groans when they hear teemo.

also, in team fights, he's pretty much as useless without a good team as Kog'Maw. He deals a lot of damage with little items, but his auto-attack range is almost melee.

He basically is a counterpick for multiple solo-top champions and kind'of fails at anything else if the enemy team has proper ward coverage and an oracle's

I don't like a teemo in my team also because he's so squishy for a solo top, and bruiser teemo feels....odd...

Most people are jealous of Teemo's cutiness.

I personally dont like teemo at all (either on my team or against.) I dont like having him on my team because in all honesty his a bit like trendy, in that he is a good champ but soooo easy to deal with.he has some great utility with his shrooms thats are practically wards which i guess is nice to have, especially since noone ever wards haha.

I hate dealing with him because he has such a low skill cap and while I know how to deal with him, alot of people do not, and those people seem to alwasy be on my team lol

Oh, and lastly... Statistically speaking, Teemo's slightly overpowered at ANY skill level, (he averages a strong 53-54% win rate even at platinum) yet few people are willing to admit this. Hence they get really, really angry whenever a Teemo kills them.

For me, it’s not Teemo, it’s the player. For many new players, Teemo is a convenient champion: W is a panic button for chasing or escaping, E makes it easier to last-hit and the shrooms are basically free wards. Sometimes people rely on these crutches too much that they do not improve their actual skills very much – I always worry that the Teemo player on my team falls into this group.

I really like using Temoo simply because he can dominate early on. All you have to do is purchase an Ionic Spark and and minions will start to fall with ease. Next thing you know your level 18 and picking enemies off and sprinting to the other side of the map before anyone notices