I'd say almost any type of bug, but a few are rather cute, I personally love inchworms <3
However some bugs, such as maggots, flies, and mosquitoes are generally /very/ disliked among humans. I'd guess this would stem from the fact that maggots and flies constantly surround dead or decaying things. In movies and shows, whenever you come across a dead body they often have flies buzzing around the carcass and maggots falling from rotted flesh. Not a good image and it really leaves a mark for anyone who hadn't encountered the animals before. Mosquitoes are known disease spreaders and they are very annoying, not to mention they take blood and leave itchy marks over our bodies, instantly giving them a bad name and rightly so. The discovery of Malaria, which has been known to also come from mosquitoes has also increased the vast dislike of these bugs. Leeches are another big one for me and a lot of people. Anyone who has been bitten by a leech and was forced to rip it off because no salt was around will probably agree that these slimy creatures are highly dis-likable. I'd say pretty much any bug that is known to bite and sting isn't liked in general. Honey bees are often thought of as cute and cuddly because of their fuzzy bodies, but an angry bee swarm can be deadly at times.
I think that there should be caution among people who find dangerous animals cute and likeable. They may seem like they are 'misunderstood' but in the end we have to remember that they are wild animals and can very easily hurt us if we aren't careful. This goes particularly for people who keep exotic wild animals (like tigers, lions and big cats, along with big snakes and other large 'wild' animals) as pets in their backyard. Not only is it unethical, but it's dangerous as well. Sorry if I went a bit off topic ;u; I thought it might be interesting to bring up popular animals that are misunderstood as well. On FH, for example, I'm guessing a lot of people adore wolves and lions, but we should never forget that if met with these animals in the wild, they probably wouldn't hesitate to attack, and I think that's important to remember.