Dear Shri Chandrasekaran,
Let me first tell you that I am a non-conformist old tāttā of 72 years. Due simply to the time for which I have lived, I have had the opportunity of seeing (and also been compelled to copy) the brahmin lifestyles of people born from 1880's and also to see the very present generation of brahmins. Believe me, I can vouchsafe on the honour of my word that Brahmins have degenerated without any shadow of doubt during this period.
Let us forget the superficial trappings. I remember people of my grandfather's and great grandfather's generation [I was lucky to see my mother's mother's father who lived very hale and hearty up to a ripe old age (for those times) of 84 years.]. They were a distinct set, I would say. The honesty, value they gave to oral promises/assurances, their knowledge of Sanskrit and hence of our scriptures, their attitude towards gurujis, swamijis and others of that genre, their views on temples vs worship within the homes, in almost all aspects the tabra community (at least in Kerala) has changed a lot. I find these changes to be degenerative for our community.
Simply by performing Sandhyaavandanam twice or thrice a day, sticking to vegetarian food and being a teetotaller, I do not think that today's degenerate brahmins will be able to regain even a small percentage of their past glory or brāhmaṇyam, if that word expresses all aspects special to a brāhmaṇa.
Your complaint is about the youngsters of today drinking, eating NV food, etc. Our ancient ancestors, the rishis who have been named as givers of each sooktam, have extolled the virtues of a drink called Soma. Indra, the main deity in the Rigveda is depicted as getting highly in rapture drinking the Soma juice offered to him. (R.V. IX-12). Similarly, if you take the trouble of studying our scriptures, it will be seen that eating non-vegetarian was not alien to the brahmins of yore. In fact some of the smritis recommend the meat of different kinds of animals to be given to the braahmanas in the Sraaddha rite so that the pitrus (manes) remain satisfied (without hunger) for different lengths of time.
In sum, therefore, there is really no relation to one's "brahmin-ness" and his/her being vegetarian, teetotaller, performer of sandhyaavandanams, etc. Your motto of "It is better to die standing than to live kneeling"! will be good as long as you keep it your personal policy or motto.But, it will be foolish to set standards of brahmin-ness for others based on a few items which you feel are important.
If you truly want to be a brahman, get back to a Vedapatashala immediately, learn vedas and sanskrit as best as you can, adhere to the nityakarmaanushtaana prescribed under the sootra your family has been following and then think of one of the permitted jobs for brahmins which are —sva dharmo brāhmaṇasyādhyayanam adhyāpanam yajanam yājanam dānam pratigrahāsca (arthaśāstra I-3-5 to7)
The permitted sva-dharma for brahmins are learning and teaching of vedas, performing oneself and on behalf of others of yajnas, offering and receiving gifts or dānam,