Not to mention the system of anime production committees making it ridiculously difficult to make anything new or creative. Here's a short post that kinda explains it.

Thanks to these groups of companies, all expecting a share of the profits, only extremely safe IPs are chosen to be adapted. All that hyper violent, hyper sexual garbage is determined to be a "risk-free" investment (thanks to the legions of basement-dwelling otaku), so those are the only anime that are made these days. As an added bonus, almost none of that money goes to the animators that actually make the shows (which is only to be expected from a creative industry under capitalism). Writers, directors, and animators all genuinely want to make more creative content rather than trash, but their hands are all tied. Death to the modern animation industry for real.