Meta Software Developer interview questions

Tech phone screen was general tech conversation of technologies worked on, projects and past work experience and telling me about the work and culture at Sage Intacct. The interviewer was very sweet and polite. On Site: All Questions were Leetcode HARD level questions variations, being copy pasted or typed exactly from Leetcode HackerRank by looking at screen. 1 was a tricky variation of the number of islands question from LeetCode, one was a super hard DP problem similar to coins problem of Leetcode. I mentioned to the interveiwer that although a DP solution is available, I am not comfortable with DP and hence doing the iterative version, he reacted in a very confused way as to 'why DP/what DP'. After I gave the full solution on the board, the interviewer didn't seem interested in discussing the approach or anything else. He just wanted me to write the same code from the board on HackerRank coding screen and submit it. Obviously, in the last 12-14 min, I couldn't complete this question at all. This was followed by a system design question about online collaborative editing tool.