Missile Man Stage Issues
So you like torture eh?
Missiles that go way too fast
A good example of stuff that couldn't move that fast on 8-bit. These bastards come out of nowhere barely giving you the time to react! It's incredibly hard to miss these guys unless you memorize the exact move to jump and fire at a very specific moment in time.

Parachute spikes?
No No NO! Mega Man does not have elements that float and kill you instantly. If you want spikes they go on the roof, walls or ceiling. For these obstacles, you either have to make sure you hit these parachutes or just wait for them to pass you by. Very annoying and frustrating. If anything, give us something that causes minor damage not instant death!

One too many treadmills
You literally have nowhere to rest at various points of this stage. Most of this stage has these annoying treadmills which require you to speed run and jump with pinpoint accuracy to get where you are going. Even with Roll's double jump you get knocked around still and have to start all the way over. MM2 Metal Man stage had maybe 5 treadmills? Not 40!

Way too many meat grinders!
2,3 maybe 4 are acceptable. Having to speed run through 7 is worse than a root canal. Then you have to deal with the treadmill on top of this, it's rather annoying if not impossible to complete.

Overuse of exploding time capsules
This is just annoying to no end. You will see this even worse later in the game but it just screams of bad level design. A typical Joe Schmo player isn't going to know how to beat these and Mega Man game always used these sparingly.

Missiles and jumping
JESUS this is just ridiculous. I would garner this is similar to MM9 where the difficulty is cranked up at the end of the level, but this part here is just insane. If you haven't thrown your controller on the floor by now, you will.

Impossible part #49
This part of having to hit the exploding capsules and not get crushed by the meat grinders is just the game being a complete asshole. You really either get it through with luck or you are dead.

Dick move - Big Eye at the end
After all, that bullshit, let's just throw in a Big Eye at the end, just to really piss you off.

Not enough room
I'm not a big fan of not having the entire screen to fight the boss on.
