@MangaField "Don't call me greedy, you little brat. I have already more money than you will earn in your whole life." calm down dude, you just typed something an evil chairman-esque villain would say. I do agree that M+ kinda sucks, both quality of the scans and the UI are either subpar or just "eh, passable". But with that said, he does have a point. Don't expect quality from anything that is free, even if other translator/scanlator could do it better.
Right now any scanlators that are translating WSJ or intending to do so are at the mercy of Shueisha. The best thing you could do is either support you prefered WSJ scanlators quietly (if they still exist), or try to use what is available (M+). Take JB's advice "We hope you all support MangaPlus! If they aren't doing a good job, email them". if you don't like it, contact them through Facebook. It's the only official way to contact them that i could find, if you know any other way to legally and officially contact them. Great! share the link. Just don't spam them with hate mail or mention any other scanlators that did their job better. Just point out problems or suggestion that may help the website, and PRAY to anything that you believes in, that they would listen (that's still a big "if).
At the end of the day,Shueisha still owns the rights. We can only hope that our constant ranting would eventually reach their ears. (just like what happened with DQ11 and Square Enix)