[updated] looking for advice/feedback on my 2 month Europe itinerary

I posted a few days ago a rough itinerary for a 2 month Europe trip I am going on next summer but got a lot of feedback saying it’s way too rushed , I’m just seeing cities etc etc. I cut some places and added a bit of information to justify why I’ve picked the places I’ve picked

The purpose of this trip as a 23yo is to lounge on beaches, party, and explore historical sites . At this point in time I’m not prioritizing rural or very small cities , however it is something I’d like to do in the future . That being said, this is what I have in order

🇬🇧** LONDO**N

Fly out May 31st

June 1st- 5th

🇮🇪** DUBLI**N

June 5th- June 8th

🇵🇹** LISBO**N

June 8th- 12th

🇵🇹PORTO

June 12th- 15th

🇪🇸** BARCELON**A

June 15th- June 19th

🇪🇸IBIZA

June 19th- June 23rd

🇫🇷** NIC**E

June 23rd- June 26th

🇩🇰** COPENHAGE**N

June 26th- June 30th

🇩🇪** BERLI**N

June 30th- July 4th

🇨🇿** PRAGU**E

July 4th- July 8th

🇭🇺** BUDAPES**T

July 8th- July 12th

🇮🇹** FLORENC**E

July 12th- July 15th

🇮🇹** NAPLE**S

July 15th- July 19th

🇹🇷** ISTANBU**L

July 19th- July 23rd

🇬🇪** TBLIS**I

July 23rd- July 27th

I would love any sort of feedback in terms of whether this seems more feasible, whether these specific cities fit my description of the purpose of my trip etc. anything helps! Thanks