Basically it was set up to make you buy all 3 books whether you wanted too or not.
No, there are the free basic rules and the SRD. With those you can run a game without spending any money (heck you really only need the free basic rules). I would recommend buying the MM though. Also, I am pretty sure every monster manual of every edition had the monsters listed alphabetically, so that really isn't a 5e thing. Even the BECMI books had them alphabetically in each book.
They are disorganized and often unclear in areas or at the very least confusing. I really miss the BECMI version.
That is some revisionist history. I still have my BECMI books and they are a mess IMO. I am currently converting the Immortals rules to 5e and if it were so small it would be a real pain in the ass to find anything. There is just little to no logic about it.
Dungeons are practically non existent since you can't hardly put one monster in a dungeon that won't fight the rest of the monsters in the dungeon.
That is completely up to you. Nothing new here in 5e. 1e/BECMI were notorious for nonsensical dungeons. But if your making your own, you can make the monster fluff whatever you want. Heck in one of my games we have players who are: lizard folk, yaun-ti, dragonborn, elf (2 actually), and a halfling that was raised by Sahuagin! Your not bound by the descriptions in the book - be creative!
It's all about campaign until your character is maxed then dump him and start and new character and repeat.
Never been my experience - in any edition of D&D (but I didn't play 2e & 3e)
There are so many short cuts to make the game go faster anyway that I don't know how people haven't gotten bored playing.
But you don't have to go fast. Some people like that, so it is there, but you don't have go that route - heck you don't even have to use XP. One of my groups has only advanced 3 levels in 4 years of playing. You control the pacing - not the books.
Gary Gygax and Dave Arneson would be disappointed that their masterpiece Idea has been so watered down to this pathetic, slapped together mess.
Hmm, that reminds me more of 1e D&D than 5e personally. I loved D&D back in the day, but it was such a mess I had about 20 pages of house rules. With 5e, I can't all of our changes on less than a page.
It astounds me that 175,000 fans of DnD thought this was good. The game use to be unique. Each character class had their own spells unique to them, utilitarian spells were actually useful, certain classes used certain weapons that other classes couldn't, you could run dungeons, campaigns, mass battles, build castles, level 35 and spend hours having a ball with friends and your character took on a life of his own that was unique because he wasn't like the other classes in any way other than he was on the same adventure. Now it's a rinse and repeat.
I don't know if you have actually played the game. But that has not been our experience at all. It really sounds like you are making assumptions from reading and not playing.
As a matter of fact the only reason I play is because my son is getting into it and it is quality time with him. I hope he loses interest quickly so I don't have to be tortured to play for long and I'll likely never pick it up again.
OK, so it seems you've played some - my mistake. However, it really seems like you are putting some arbitrary limiters on your fun. If you liked BECMI so much, you can still get that version; or you can use some of those rules in your 5e game. Or look for ones already converted to 5e like: mass combat, retainers, and strongholds to name a few. Also, there a tons of class options available on DM's guild and even here on EnWorld that can give your players a variety of play experiences.
Also, you didn't mention the disadvantage/advantage mechanic. What do you think of that? It is one of the few innovations with 5e.
I started playing 1e / BECMI in the 80's and went on a mult-year hiatus and started playing again with my sons when they where 4-6 with 4e (now my eldest is getting ready to go to college). They loved it and we transitioned to 5e when it came out. We have had a great time. I think if you let go of some of your baggage - you will to!
