There are several reason's why Monster Hunter has become much easier in comparison to how it was back in MH1.Blazevoir wrote:
It's probably easier because we're used to attack patterns, even if new monsters are added.
One reason is that they've removed/improved 'old monster tendencies'; Monsters used to randomly tail whip or charge with no preemptive signal. Like one second you just have a Rathalos just standing there then suddenly it goes into a full blown charge. Stuff like that doesn't happen anymore.
Second reason is that damage taken has been severely decreased. The first Yian Garuga you faced in MH1 and MHF1 used to be able to one shot you with nearly any of it's moves. The tail smash of an enraged Narugakuruga in MHFU was a one shot; the water spit of a Plesioth in MH1 and MHF1 was a one shot and it's body slam did nearly as much damage.
Third reason is better hitboxes. The hitboxes in previous games, especially MHFU was atrocious but that's what also made MHFU the elitist game of the series that difficulty enthusiasts loved since small mistakes were punished hard. This was the time where 'skillful' montage videos became popular in the MH community where you'd see people start posting cool lvl 3 charges with a GS against a running Tigrex and other things or no armor, no damage taken HBG solos against G-rank monsters.
Fourth reason is that gameplay has become a lot more diverse. With each new generation of MH they add new things, new moves. Charging on GS never existed in 1st generation; rapid fire didn't exist for LBGs and certain weapons didn't exist.
Fifth reason is that they balanced the game so that you do more damage. They wanted to decrease the time taken to kill a monster so they've increased the damage of weapons and removed some resistances from monsters. Weapons bounce a lot less compared to older games.
Sixth reason, Felynes...
Final reason is that they have made the game more easy through the ability to go multiplayer. Back in 1st gen and 2nd gen, the series was heavily notorious for it's difficulty and back then it was mainly a PSP game making it a really hard game to have online multiplayer options. Because of this, despite being marketed as a multiplayer game, it was mainly a solo game. In the days of MHF1, MHF2 and MHF, people played it for the difficulty, people bought the game because they wanted to prove to themselves or other people that they could finish it solo. MHFU for example was a 300+ hour PSP game and only around 10-20% of the people that bought it could actually finish it solo. Those people were the kind of consumer base the series had at the time, elitists and I'm not even going to lie, I'm one of them. But because of this, it made the series harder for newer people to pick up so Capcom decided to fix their issues and make the multiplayer actually viable to play by moving the game into a more suitable console and here we are now.