Average should be a 7, meaning it is a good game but nothing spectacularly impressive about it. No one should be turned away by this score.
The reason why a lot of gamers consider 7 a bad score is that they've played games that were rated as such and said games were bad. The error here isn't on gamers, but rather the reviewers with their inflation of scores.
There are significant flaws in the review process of both retail and digital-only games. Retail games that tick certain boxes like production values have a base value of about 7/10 assigned to them, so even if they suck, they can't really get a bad score. Indie games are commonly overrated as well, probably because reviewers draw comparisons to 7/10 AAA games and conclude that they enjoyed the indie game more. Thus the score inflation of AAA games carries over to indie games. The conclusion that the indie game is better may be correct, but the scores are out of line because of a fundamental error in the review process.