Not at all since I got tinnitus :(
I never went too much but I enjoyed them from time to time, I tried to go only for bands I really loved and were unmissable (I still can't forgive myself for not going to a Linkin Park concert). Not sure I would enjoy now with all the crowd, plus the rising costs. I would prefer a pub or something similar to stadiums for sure.
Merch is usually super expensive so unless I can't find it anywhere else, not really.
I feel you, I have it permanent as well and similar story about LP. Luckily compared to other horror stories I read, mine seems relatively "low" so I am thankful for that. In my case it was a couple of hi-fi headphones and amp thanks to a shitty person who made me believe that if you don't blast your wars you cannot feel everything a system like that has to offers.