A lot of reviewers have pointed out that the script goes out of its way to make male characters incompetent or useless, and here is an abridged list of how Red Guardian was utterly humiliated and nothing more than an effigy to be burned at the altar of man-hating:

– he is overweight and out of shape, plus an entire scene is dedicated to laughing at him as he is unable to fit into his old costume
– when the Black Widows break the Red Guardian out from prison, he instantly gets punched in the face by his “daughter” for being a horrible deadbeat dad
– he is surprised that his daughters are angry because he is happy to see them, but he is immediately made to look stupid and insensitive when he makes a joke and doesn’t know that they were sterilized (despite the fact he should know this was done to them considering his close involvement in the program that created them)
– his patronizing joke about “Is it your time of the month?” allows his “daughters” to further emasculate him, and he becomes ridiculously squeamish over their descriptions of what was done to them (remember the Red Guardian is supposed to be a soldier who has killed people, yet he somehow can’t handle even the thought of “gross lady bits”?)
– it turns out that he is just a dumb brute and can’t even help them out (the only reason they broke him out of prison was so he could tell them where the Red Room is), but instead he says he can point them to the woman (the Black Widow’s Mom) who can answer this important question (she was the brains behind the whole thing, but he was just the dim-witted muscle who got told what to do)
– Red Guardian shows he has a very fragile ego when he asks if Captain America talks about him, and he is upset when he is told that Steve never mentioned their battles, nor talked about him in any way, and he acts even more pathetic than a weak 5-year old boy as he says his “he didn’t even mention me once?” lines
– in the final showdown of the film with the Taskmaster, the camera cuts away when the Red Guardian starts fighting the Taskmaster, showing it to be unimportant, and only cuts back to show him defeated, whereupon he is saved by the Black Widow’s Mom, and later the Black Widow fights and takes out the Taskmaster easily