Demos are fine the way they are. 90 muni isn't cheap,even less so if you wanna pull the ol' demo/mine combo, and Axis don't need anything else to stack the deck in their favor. As someone has already said, sorry if your shrek/ LMG blobs are getting destroyed by demos; maybe learn a more balanced approach to combat, instead of attack moving your blob ?
I hate blobs too. People aren't complaining that it destroys blobs. It's that it can auto-delete single units too and with great ease. Two clicks.
90 muni is quite expensive but it's a cheap exchange for 250-400 manpower + upgrade (shrek/lmg).
If it was only destroying blobs, I wouldn't mind it so much. But it removes units one by one all through the game. The only way to avoid it is to lead every attack with a minesweeper, to harass every point with a minesweeper. To do that you have to wait for them to get to the field. So you lose territory which means more munis for more demos.
If both sides had demo, the game would become less dynamic with people waiting for sweepers so they can make attacks. If neither side had them the game would be much better.
There are several threads on this with some very high level players calling for its removal and no high level players saying "it's fine". I just wish the less experienced players with a lower understanding of CoH2 and RTS would look to what the top players are saying instead of defending it on the basis of "it makes me feel good when I blow up squads with demo, therefore it's good". or "Axis has OP-Soldaten so we need demos"