We love butlins! Like previous posters have said, if the kids are happy then so are the parents!
Mine are aged 11 and 8 now and we have been to Skegness every year since the eldest was a toddler and I plan to book a break there every year until they tell me they don’t want to go anymore and I can’t see that happening any time soon.
We managed to swim everyday (fantastic pool) had the beach right on the doorstep, played tennis, crazy golf, pool, bowling, go karts, funfair, family bike, high ropes, climbing wall, cinema, splash park, circus, panto, magic shows, comedy shows, music shows and so much more...
I honestly don’t get the snobbery about it at all, I’ve seen so many people say oh my kids wouldn’t like it, just makes me curious as to what they like to do?
You should definitely go op, I couldn’t recommend it enough.