Is making a final season that hard compared to building the show itself?

I've noticed a lot of long-running shows seem to struggle with their final season, even when the earlier seasons were excellent. It makes me wonder: is creating a satisfying ending actually harder than building the show in the first place?

When a series starts, writers have room to introduce new characters, mysteries, and plotlines. But by the final season, they have to tie everything together, satisfy fans, resolve character arcs, and deliver a memorable conclusion.

For people who follow TV production or writing, what makes a final season so difficult? Is it mainly a writing challenge, network pressures, actor availability, audience expectations, or something else? What do you think

Some Mentions: The umbrella academy, Dexter, Stranger Things, Sex Education, The boys, Game of Thrones, How i met your mother, Lost, Euphoria etc... Of course there are good final seasons for great shows but this trend of awful endings keeps increasing (at least from my point of view)

P.S. - The shows ive listed have an objectively bad final season, but if anyone cares. GoT i liked the production and some of the effects, but it was just tragic from there. The Boys is just dissapointing while still being better than the previous season tho. Sex Education and Euphorias are the same for me, way worse than previous seasons but still enjoyable on some level. How i met your mother was bad but i didnt even care, idk why. The rest i hated (i also want to mention suits, since SPOILERS left the show i just lost the drive for it, but that makes it more than just the final season)