Yes I agree, there are a lot of times where Umaru was a complete brat and was utterly selfish, but its different than when watching someone like Kirino from Ore no or The Familiar of Zero where the main girls are physically abusive and very mean while Umaru acts like a child.
I really like the secondary characters as well; especially Taihei and Ebina; despite some annoying attributes, I grew to love them. But what I love most is that Umaru truly cares about her friends and is not as a facade, which is a major plus cause I can't stand it when one treats her friends like trash but fakes kindness.
I do recommend this anime to those who want a similar experience to Ore no but with more likable characters
