Your quality score is based a lot on relevancy and CTR. So if your keywords, ads and landing page are relevant to each other than you better start working on CTR. Try to raise bids to see if you get a better CTR when you're in position 1.
Hi xantoniox, Sounds like you have a good start with the 7/10 but work your CTR score. Get rid of keywords that are not performing. Keep working on it... it takes time to get to build a quality score up to a 10/10.