Um, because there is a difference between condemning, criticizing, or questioning, first of all. Second, there is a difference between ‘condemning’ the approved OF done validly and licitly and ‘condemning’ not the Mass itself but invalid and illicit abuses of that Mass. Thirdly, there is also a difference between ‘condemning’ the Mass and questioning words or actions which may not be invalid or illicit per se but which are innovations or experiments that are not specified and were not ‘organic’ to the liturgy, but added on without any other consideration than, "I think practice X is good, so we’re going to do it on MY turf.’
I for one am not going to say that the OF is invalid or illicit though as a matter of preference (based on my age and other reasonable factors) I prefer the EF. That is a personal preference, just as some people ‘prefer’ a early morning Mass to a later Mass, or Sunday Mass to Saturday Mass. ALL of those Masses are equally good and valid in and of themselves, but I may legitimately prefer any one of them based on all sorts of factors, including whether I am a morning or ‘night’ person, whether I have job duties on a Sat. or Sunday, whether I like the particulars of a given Mass (organ or guitar, ‘low’ versus ‘high’, younger people versus older people, more ‘hands on’ or more ‘contemplative’, etc.)
Very few people actually think that the OF is not valid–and those people are almost to a man SV, not the kind of traditionalist Catholic who is perfectly loyal to our Pope and perfectly accepting of both forms of Mass.
Unfortunately, because many of the SV people like the EF (and think it ONLY is valid), some people think that ANY person who expresses a ‘preference’ for the EF is DISSING the OF or questioning its validity.
Let’s imagine there is a huge group of people who hate dogs (nasty people) and all of them love vanilla ice cream, and only vanilla ice cream.
Now suppose a person who is new comes into town and orders vanilla ice cream because he happens to like vanilla ice cream. . . and suddenly is surrounded by people screaming at him" Why do you hate dogs?" Boy, is he confused. He just likes vanilla ice cream. . .but because a big loud group has identified itself with vanilla ice cream, he gets ‘tarred with the same brush’ for a preference for vanilla ice cream which has nothing to do with him hating dogs. (in fact, he loves them).
Now you see what 90+ percent of those of us who identify as traditionalists have to deal with–people think because we ‘prefer’ one Mass we’re Pope haters and “OF haters”, just because one loud group says that they are Pope haters and OF haters --oh, and they just happen to ‘prefer’ the EF.’