Ripple Full Stack Software Developer interview questions

Unprofessional from the get-go, Got a message from HR on LinkedIn on which I replied, and then he forgets about the message only after my followup he sends me a meeting invite to discuss the role. Later he sends me a Backend development test very simple Spring boot based application. The recruiter sends the code to the hiring manager and then he looks at my profile in detail since I also have front end development skills like react he askes me make front end app as well. After this, an interview is scheduled. Questions in the interview were completely vague nothing specific. Result of the interview is I get rejected because of the skills that I have not mentioned in the resume like Java reflection based framework development and spark and Kafka. So if I have 15 skills and they rejected because of 2 other skills which I don't have, neither have I mentioned them in my resume. I don't know what they saw in profile when they shortlisted it if they are so keen on those 2 skills they wouldn't have contacted me and saved my time building meaningless apps for them.