I mean, sorry to say, but like ... none of your complaints really warrant merit.
You being a hoarder isn't really anyone's fault but your own. For what it's worth, I understand how you feel - I'm a hoarder as well, and eating champs stings a bit. But that's a personal tick, and I don't expect Plarium to appease me on that. I keep one copy of all rares and epics, and I'm currently at 130 champ slots in both main and storage. That's enough for now, and when I run out of space, I can expand those to suffice.
Level 25 dungeons are actually perfectly set up. If you don't have the resources to be able to tackle them effectively, then stick to the level 20 ones. At level 20 you get a slightly better ROI on energy for event/tournament points, whereas at level 25 you get a slightly better ROI on energy on 6* items. They set it up in a way that gives you the luxury of choice, so it's baffling to me that you would be upset.
As for CVC? They are *literally* giving you a ton of free stuff at zero cost, and you complain?