In my experience I've met trans people who are transphobic, if you can believe that. They just want to grind through transition as fast as possible and get on with their lives.
For those making harsh judgments about others for being phobic in some sense or another and saying they're a waste of life, I find that sentiment lacking compassion and insight. They are not wastes of life, they are simply uneducated and lacking compassion. Most likely they have never met someone like us. Prejudices are usually fueled by fears that one is the same as those they are prejudiced against which causes them to be quite verbal and negative about their fears, jumping to an attack mode rather than support. Again, education is key, not degradation and insults.