Losing? heh, no. In fact, I've won 2v5 against intermediate bots. Literally, me and my duo friend did a bot game for first win bonus, trying to bust it out real quick.. and then 2 people DC, causing 3rd guy to quit thinking the game is over. The two of us then managed to win the whole game by split pushing, splitting the bots up and backing off if they got close while other person pushed another lane. If we ever caught one bot a little bit away from the others, we'd burst him and back off. It's not hard with good communication and critical thinking skills since the bots follow predetermined courses of action.
I do play a fair amount of bot games, more then most on here, because I'm generally only playing 2-3 days a week, for 3-5 hours at a time. So, I normally play one bot game, with whatever free champ(s) I'm not familiar with, to get first win of the day bonus quickly. I haven't lost a bot game in years, though.
No, I'm in bronze III and don't mind admitting that, cause I know exactly why I'm there. I went 2-3 due to DCs in two of the games to get into bronze IV. Then I moved up to Bronze III almost immediately. But, I know my mechanics suck, I play on a shitty laptop at 10-15fps. My game theory is what lets me win at all, I'm generally playing support or jungle because of it, but I haven't even been playing ranked because I rarely have enough time to shake off the rust before I have to stop playing for the day. Last week or so that has changed a little, so I'm starting to play ranked again. I think I should settle in between Silver II to Gold V once I get a good 100 ranked games in. I'll never go above that till I get a better computer, though. That's a hard ceiling with my framerate and shitty mechanics that result from low framerate.