There are different kinds of fans. There are the type that epitomize the term "fanatic" who cannot stand to hear anything negative about their favorite team and players. Then there are the negative fans, who root for their team, but what comes out of their mouth most is complaints and other negative comments. Then, I'd argue, there's a third type of fan, one who strives for balance and rational thinking. One who attempts to not be blinded by fanaticism, or be overcome by anxiety and negativity, but instead tries to see his favorite team for what it is, both the good and the bad.
I try to be the third kind, and I'd say you probably are too.
That being said, I think you are being a little overly critical of Luke Walton. He's just not as good as most people think he is, but what he does bring is often overlooked. He's a good passer, pretty good in the low post when matched up against smaller players, and does a lot of little things that help the team. He's overpaid, but is a solid 7th or 8th man, and I think he had a good run in the playoffs.