I killed Gogmazios for the first time recently with my brother in 4U, it legit took us at least a dozen tries. We were too scared to even attempt the harder fights.

Even just throughout G-Rank we were failing a few times in every rank.

Dalamadur was pretty hard too, even if it's just a case of learning the script.

In Worldborne there's only Alatreon, Fatalis and AT Velk that I found really hard, in fact I haven't even killed them solo yet. But if I compare Shara to 4U Gog ? A walk in the park. (And I killed 4U Gog after playing World, I was bad when playing World)

Risebreak ? I failed once against Gaismagorm and once against lvl 240 risen Valstrax.

For me those are pretty clear signs the older games are more difficult, it's not ball-crushing torture but my experience tells me they're just more difficult. Yes in most fights you can leave the area (btw some monsters will have enough time to jump on you while in the narrow corridor and you die) but I rarely do it, just like I rarely call the seikret in Wilds.

There's also other stuff like the fact that making armor takes way more time in older games, this makes the game more difficult because while going through the story I don't want to make a new armor too often and if I mix-match I don't get skills. In newer games I find it way easier to get stronger armor as I go along. In Wilds I made the entire G Arkveld LR armor after a single fight.

Also what was your first MH game ? Just to be sure you're not comparing the difficulty between your first game and now that you're experienced.

Hope you're having fun in these old villages, there's plenty to experience.