Re: bad technique vs. resistance
Kotegaeshi - determine a lateral projection (the aikido technique most good on camera, and yet the most dangerous one - people seems to worry about tendons, yet if you fall on your neck, that's much more worrisome).
Cut on the wrist, push down towards your hip, plummeting, push outward with the other hand on the hand you've cut down.
With a rigid wrist (which is mostly the case) don't get intimidated, just do it. Easier to be said than done :-)
shihonage: that technique where they invariably fail to explain to you that it will never work if you don't make sure, first, that your uke's palm is turned upward. If you manage, it allows a great control, for once on the side of uke you won't even need to push down his hand - walking would suffice to make him fall.
I have no idea whi even Ueshiba does it, often, pausing before rotating on himself - it should be one flux.
Both techniques imply that a striker repeatedly punching you does not succeed, at one given moment to prevent you from going lateral. Going lateral under incoming blows and with an uke highly dynamic on feet is probably the WHOLE challe nge to make aikido usable in a real fight.
If we consider that in all dojos we still see attacks made as a shokomenuchi, we can't help but think that we are reproducing a false paradigm - the paradigm of a samurai whose sword has been taken away from him, utterly unacquainted with the extremely violent settings that a, say, "bar fight" in the WESTERN world may imply.
That's the whole issue: managing to go lateral against an opponent repeatedly punching you and fast on feet, determined to keep facing you.
We never train for this scenario. What we see on videos with tsuki+aikido is invariably performed on kes that do not display the full range of motility, brute force and determination that a real and a bit competent striker may produce.