I think that this “Guilt trip” chinuch is really bad and turns many off. You could be Davening hundreds of Shmona Esreis and saying Sefer Tehillim hundreds of times, but if you smerked/snubbed the person not dressed as Tzniusdik as you, it might be worthless.
The older I get the more I see that Frumkeit isnt a black and white issue, measured strictly by the amount you Daven or learn. With increased life experience and maturity, thats hard to fathom.
Also Ive been taught that if people try to figure out the Cheshbonos of the One Above, Hashem tells them, come up here and Ill show you how limited your vision is…and brings them up.