I find it easy to start anime but difficult to finish it. I've started several anime but they always seem to get boring a few episodes in. Is this a me problem or does seasonal anime have a massive drop in quality in the back end?
For example, Train to the End of the World is a pretty fun show but the last two episodes have been either boring or weird. Is this sort of falling off common in seasonal anime?
I think it's mostly due to issues in production (largely thanks to ridiculous schedules) stacking as a series goes on. Slight delays on 10 episodes in a row becomes overwhelming delays on episodes 11 and 12. A director of an anime original might have a great idea for a concept but not have thought through to the ending until well into production. If contractors fail to meet the standard necessary, budget goes to hiring more people to redo their work meaning there's less available in the future.
In summary, watch Shirobako.