Did gulliver give the impression of lilliputians as petty and small minded?

Yes. A good example of this is the strife within the society based on the conflict over whether an egg should be broken at the top or the bottom; the two sides are the called big-endians and the little-endians. There are many details within the text that suggest that the lilliputians were meant to be a satire on the English court.

Also their small size may partially serve the simple purpose of indicating they have small minds