Zardnaar
Legend
O.K., that's no excuse; I normally homebrew as well. I am currently running Descent into Avernus but I'm only keeping the skeleton of the adventure. I've added my own material, changed the timeline of when things happened and tailored the adventure to my player's tastes. I still think the book was money well spent - it has given me plenty of information and is useful outside of the adventure due to the gazetteer.
I have also bought the one volume edition of Tyranny of Dragons, have read it through and plan to do the same with that. I can see the early sections of 'Hoard' are problematic but easy to sort out. You make the material your own. I personally feel that anyone going to DM a published adventure should be prepared to change it and needs to be flexible. I pity the players of a DM who is not - I've played with one or two DMs like that and it was no fun; railroading; inability to adjust when we went off track; not accounting for what the players want to do.
Plenty of people have played Hoard over the years - it's not as well constructed as later books but it's not bad - and it's still in print. Therefore, while it might have failed your personal metric you seem to be in a minority and appear curiously inflexible when it comes to running a published adventure. I have been running tabletop RPGs for 30 years and only a handful of times have I come across DMs/GMs who do not adjust published adventures - the ones I mentioned above.
The reason I'm running a prepublished adventure is because.
1. The adventure is interesting and I want to run it.
2. I'm being lazy and want run it with a minimum of effort beyond changing some names.
I often mine adventures if course. I haven't run a prepublished adventure for a while.