John Gill Commentary Judges 8:22

"Then the men of Israel said unto Gideon, Rule thou over us, both thou, and thy son, and thy son`s son also; for thou hast saved us out of the hand of Midian." — Judges 8:22 (ASV)

Then the men of Israel said to Gideon
Some time after his return, the chief men of Israel having met in a body, and consulted matters among themselves, sent a deputation to Gideon with an offer of the government of them:

rule you over us, both you and your son, and your son's son also ;
by which they meant, that he would take the kingly government of them, and which they proposed to settle in his posterity for ages to come; for, as a judge in Israel, he had a sort of rule and government of them under God already, but amounted not to regal power and authority; and this was what the people of Israel were fond of, that they might be like their neighbours; and this they tempted Gideon with, who had done such very wonderful and extraordinary things for them, which they allege as a reason:

for you have delivered us from the hand of Midian ;
from the bondage they were in to them, and therefore fit to be a king over them.