PayPal Project Manager interview questions

Got contacted by the HR. Had an initial screening round and then 4 video rounds with the team members including 2 PMs, 1 SPM and the hiring manager. Each round lasted for 1 hour. Interview was conducted over a 2 week period. After the 4th and final round I was told that my profile is on hold and they will notify me about the results. I followed up every week for 2 months but got the same response from the HR. And then one day they sent a standard mail stating "we found a slight mismatch between what we are looking for and what you possess". It doesn't take 4 rounds and an additional 2 months to determine the mismatch they are talking about. I wasn't even given feedback as to what went wrong even after repeatedly asking for the same. Clearly, they might have found a better candidate and delayed informing me for 2 months till that candidate joined the firm. They used me as backup for their sinister reasons. This is very wrong, untrustworthy and unexpected from a company like PayPal. Would highly recommend PayPal to review and improve their hiring processes, candidate communication and deadlines on informing the candidate about the results. Making a potential employee wait for 2 months and then hire someone else is uncalled for.

2 behavioral interviews with managers, basic questions such as "tell me about yourself" and "describe what you would change about your favorite product" and "why paypal". this was specific to my interview so others may have had different ones