For your human comfort yes. But mosquitoes are part of the food chain, and also help mixing blood from very different species. This, in turn, allow micro-organisms that should never meet to interact with each others, giving a new path to biodiversity.

As annoying as it is, it's a useful critter.

You see, the way you react is the very cause of our current troubles: we only see the living systems as a way to please us, and only on the short term. When they don't please us, we start hating them, and find a way to bend them to our will.

Now we destroyed most of the systems, or at least their balance, and we are painfully discovering that it may dooms us all.

So let's try to adopt a different point of view before we face even more terrible consequences of our gluttonous actions.