BASF Chemist interview questions

Got an one-demand interview 2 days after online submission. Two months later, got an onsite interview invitation. Travel expense was covered. The interview started with 90 min presentation with a 6-member panel in present followed by one to one 30-min interview. The whole process went quite well but somehow felt the panel members were very impatient. I think they might already have right one before my on-site interview. The decision was sent to me like a normal rejection email after two weeks without any helpful information. You will never grow even after 100+ interviews like that. I will be more happier if they can send me more feedback on the interview.