Mosquitoes were created for a very good purpose just like all other insects and animals it's the fall of man that made these creatures treat us like aliens instead of like the demigod we were supposed to be in their midst:

“Let us make man in our image, according to our likeness, and let them have in subjection the fish of the sea and the flying creatures of the heavens and the domestic animals and all the earth and every creeping animal that is moving on the earth.” And God went on to create the man in his image, in God’s image he created him; male and female he created them. Further, God blessed them, and God said to them: “Be fruitful and become many, fill the earth and subdue it, and have in subjection the fish of the sea and the flying creatures of the heavens and every living creature that is moving on the earth.” Genesis 1:26-28

After God cursed the ground {Genesis 3:17} all the things made out of the ground {Genesis 1:24-25} turned against Adam and Eve that's why God's word said their children has also fallen short of God's glory {Romans 3:23} but have faith and trust in God because He has promised to restore us back to glory when we will be blessed again {Psalms 67:6-7} just as He did in the beginning {Genesis 1:28} we are almost there in Paradise where we will enjoy life to the fullest without these creatures feasting on our flesh or blood anymore! Psalms 37:9-11

See you there! Luke 23:43