So start a better one, offer it for free, and the world will love your moderation style and switch.
Half serious, half not. I’m not a huge fan of what we have now, but the reality is that moderating anything sucks, policies have ti exist because otherwise morons write bad data (liking thinking it is good, but when it is inconsistent between shows and between contributors, it will always be a mess).
And media is complicated. What is the difference between TV shows and a movie? And are you sure? What about a limited series TV series? Or a short series of Made for TV movies? Are webisodes part of the same series even though they aren’t on TV? How about webisodes that sit between movies? What do you do when the network straight out rewrites history (changing season numbers, episode numbers, and similar, but doesn’t tell anyone except in ads and interviews?)
Episodes are released in different orders in different places, some get skipped, some get removed from broadcast so do you leave a gap? And what about when the episode appears on the DVD but in a different spot?
It’s a mess, and this is the genuinely easy stuff, anime is different, sports needs different rules, nightly/weekly broadcasts don’t necessarily have a season although they might and it might or might not be the year, how do you know?
How about YouTube shows, do they get in the database? Are those webisodes?
The technical stuff (databases, APIs, servers, hosting) is all easy compared to the policy decisions and active moderation, and the moderators need to make decisions on shows they’ve never even heard of and don’t understand the complexities.
It sucks for all concerned, and I genuinely believe the various services do their best.