I'll try to respond to the question honestly, without too much edginess. I've played my share of bad RPGs, finished them even, so choosing 5 is not so hard. So, in alphabetical order:
1. Anachronox - the only game from the Codex top 100 that I sincerely cannot stand. I've heard Tom Hall is a great guy and everyone he worked with loves him. Perhaps that's why his opus magnum is so fondly remembered. But for me it was a boring slog. Basically a Western-made JRPG with weak combat, juvenile humor, terrible dialogues, and mediocre exploration. One of the few games I dropped after several hours. From what I've read the story never goes anywhere because the game had to be cut due to time and money constraints - and the sequel that was supposed to provide the proper ending was never realized. Sorry, Tom, but your game sucks.
2. Another War - Polish attempt at Infinity Engine style game in historical setting of the Second World War. Nice visuals and many interesting locations (occupied France, Nazi Germany, Soviet Union) are the only good thing I may say about it. The combat is terribly tedious and there are tons of it. RTWP does not work properly when companions stop doing what you tell them to do the moment you switch to another character. The humor that tried to emulate 'Allo 'Allo! fails miserably and quickly becomes painfully cringy. Don't believe the screenshots, avoid at all costs.
3. Dragon Age 2 - I sincerely enjoyed Origins: the story, the characters, the sense of adventure. Didn't even mind unending Deep Roads. Finished it at least twice with a rogue and a mage. That's why the sequel was such an utter disappointment. They abandoned everything that I enjoyed about Origins and turned up wokeness to 11. Everything seemed so small, you basically kept visiting the same locations and participating in repetitive encounters. Even the combat turned to shit, because they wanted to make it more 'dynamic'. What a fucking waste of potential.
4. Faery: Legends of Avalon - first PC game from a studio I actually like, Spiders. Unlike their later offerings, which are all action RPGs, this one was a kind of a Western-designed JRPG with turn-based combat and a pretty gay setting. You try to save a faery kingdom from destruction by visiting a series of (tiny) worlds and dealing with their various problems. There is a world with a giant tree poisoned by industrial pollution, a haunted pirate ship, an oriental city built on a back of an enormous desert beetle... some of the locations may sound interesting, but the gameplay is quite dull, and combat quickly becomes a chore. Fortunately, the game is also quite short, so it does not take much of your life.
5. Heath the Unchosen Path - Russian fantasy turn-based RPG stripped of almost anything - exploration, choices, interesting characters. The story that tries to mix elements of Baldur's Gate and Knights of the Old Republic gets buried under the weight of nightmarishly incompetent translation. The only thing that's plentiful is combat. Actually, there is so much combat, that the game becomes a bizarre turn-based hack&slash. Every mission requires you to go somewhere and kill the baddies, later you are rewarded with the quest item or a conversation. The combat might have been more rewarding if there was a party, an honest effort at encounter design or some tactical challenge. But fighting also quickly becomes boring. So, there's really nothing of value here.
