Preferences and opinions. Hulking 90's beast just looks cooler than the traditional beast for me, and i'm sure it's because of my nostalgia, but that's what x-men is about for a lot of people.
But "hulking 90s Beast" is the traditional Beast, it's the look he sported starting in the 70s up until the early 2000s.
As for the comics being shit now and it being the 90's fault, you would have to go into more detail than that. Makes little sense from my POV, but i'm not huge into comics.
tl;dr version (up front):
In the 90s comics tried to emulate the seriousness and darkness of the well-written Watchmen, but since it was the 90s, everything had to be EXTREEEEEEME, so it was way too over the top to the point of where it became absolutely stupid.
Or, the long version:
Up until the 80s, comics generally were a bit lighthearted, and mostly about the good, heroic guys beating the villains trying to destroy the world. They also often tackled real life issues (e.g. Stark's drinking problem, the relationship issues between the couples, the X-Men in general depicting minorities), quite often a bit over the top, but still containing solid messages.
In the 80s, it started to shift - darker anti-heroes like Punisher or Wolverine, and hard-to-place villains such as Venom started to make appearances and gain popularity. This was accompanied by some characters receiving a monstrous change - either in design or with their personalities. This was not a bad trend per se, it was another aspect of the media which was generally explored quite well.
It peaked in the late 80s with the Watchmen. That comic combined the classic super hero concept and twisted it quite a bit, placing them in a dark reality, with a dark story, filled with negative images like betrayal, broken relationships, and being persecuted. This comic was insanely well done (just about any comic fan will agree with me - I've never seen anyone say it was a bad comic, even those who didn't like it), and it was very successful.
However, it was also the dawn of the 90s. If the 90s were anything, then it was being shallow and fastpaced. No time or desire for deep storylines, everything had to be extreme - extreme over the top violence, extremely corny one-liners and pop culture references, extremely easy to forget stories. But the most important part was that every character had to have a grim and brutal backstory, and they had to be "cool".
The 90s were entirely one dimensional. Almost all the 90s characters that actually survived are one trick ponies that have one thing, do it extremely (c wut i did thar) well, but have no capability of developing beyond that - like Carnage, a character who solely was created because Venom was starting to develop into a new direction, and because people thought the hulking Anti-Spidey was cool, Marvel made a copy that could never could remotely change, never make any character development.
Add that with really shitty writers, and you got over the top messes with really stupid team-ups, shitty time travelling stories, or awfully written alternate universes (looking at you, Marvel 2099). There's a FEW books out there that are decent, but they are all infested with the same issue - the urge of having to be as shallow and dumb as possible, while also being EXTREEEEEEME.