User blog comment:Soulreaper1234/Why Do Ichigo & Aizen an Overpowered Hero & Villains?/@comment-387500-20100830103204/@comment-1454424-20100830105900

You are entitled to your opinion, you are just not entitled to respect for your opinion. Especially when you opinion is "Kubo is an idiot". Statements like that do not foster discussion and are nothing but fans showing a ridiculous and unjustified sense of entitlement. If you don't like Kubo's storytelling, you don't have to read his story. In fact, let me quote Kubo himself on this topic,

時々勘違いしてる子がいるから言っとこうかな. 読者にあるのは作品の話を変える権利じゃない. その作品を読 むか読まないかを選択する権利だ. 気に食わなければ読むのをやめればいい.

Sometimes I wonder what to say to kids who makes these mistakes. Readers don't have the privilege of changing the story. It's whether they would read that story or not is the privilege. If you don't want to read a story, then you'd better stop.

もしBLEACHよりも面白いものが描ける才能があるなら、すぐに漫画家になるべきだ. 面白ければ必ずBL EACHより成功する. 絵が描けないと言うのなら、努力して編集者になって漫画家にアドバイスすべきだ. 本 当に能力があれば、どこへ行っても歓迎される.

The thing is, if you have the talent to draw a story that's more interesting than Bleach, then please become a mangaka soon. If it's good, then it'll definitely be more popular than Bleach. If you say that you can't draw, then do your best and become an editor so you can give advice to mangaka. If you really have the ability, then you'll have good reception anywhere you go.

才能も無く、努力もせず、そのくせ与えられるものに不平を言って、努力する人間の足しか引っ張れないような 奴は、目を瞑ってどっか隅っこに挟まって、口だけ開けて雨と埃だけ食って辛うじて生きてろ.

Because if you don't have the talent, nor have the effort, and yet you want to tell me that pathetic little complaint, you're just some guy who's trying to hinder a person who's actually working hard, so close your eyes and hide in your corner, open your mouth only to eat rain and dust and maybe you'll actually live somehow.

(Translation credit: Maaru of FLOL)

In other words, if you think you can do a better job, go ahead and do it. If not... well...

And no, Chad was not supposed to be a main character. He, like everybody else, is a supporting character that Kubo can discard if he wants to. Bleach has just one main character, Ichigo. Kubo has made this very clear in recent interviews.