The worst experience I have ever had with interview process till the date!

Recruiter/HR initially contacted me for Senior front end engineer role, went thru 2 rounds of telephonic technical interviews.
I was all set with multiple offers but somehow HR convinced me to appear for on-site round at Rapid7. All weirdness starts there, although I was contacted for Senior Front end Role, they kept tagging email as for back-end Engineer level 2. They added all levels including juniors/intern for on-site interview more than 12 people where last round was about I needed to do presentation for 1 hour in front of team which was not obvious at all. As soon as I entered recruiter asked me have you prepared presentation I have already told you, kept saying that( 10 times) you needed to give a really good presentation to prove yourself in front of a team, tell me what's would you present right now! Even if I told her, I will come up with topic and present myself, she never stopped asking! (were you scaring me!!!!)

In one round, they gave me laptop and two people watched me from my sides, I urged if they don't mind I wanted to do white board coding as I am not comfortable with the coding and somebody staring at my code from 5 inches away but they kept insisting me to do on laptop. After 4 rounds, all of a sudden manager with pony tail came and walked me to the door saying they would call me. FYI, he was the same manager talking very sugar-coated over the phone interview. I was holding 4 offers when I appeared for an interview so I knew my standard.

Is this kind of a joke or insult? I would never ever apply here as they really do not have humanity. If you are really smart show your smartness in your work not to the candidate.

Just to FYI, company is just a big hallway with tables and computers nothing good about company, THINK 1000 times before going to Rapid7, even though if it is last company to apply on the earth!

All standard questions on DS, trees, map