I don't see a problem with people using hotel pool/sunbeds etc. but only if there are easily enough sunbeds spare. We go to one of the hotels on the prom and were 'invaded' by a party of about 26 with about 6/7 children. They took over the pool completely and put all the sunbeds together and took other people's umbrellas - and were noisy. This hotel has mostly German guests, with a smattering of English (us). The Germans were not impressed at having their nice peaceful swimming pool and sunbathing area disturbed - and I have so say neither were we. The hotel received a lot of complaints - unfortunately the hotel sees just the profit to be made by all these people perhaps eating, and most certainly, drinking - but it was to the detriment of the paying guests.
We will probably be seen as being 'grumps' but we go to this hotel because it is quiet and nearly everyone there is middle aged or older couples who sit peacefully round the pool, reading etc and enjoy the absence of children (who admitedly are only enjoying themselves, but can be noisy).
I think if you want to go to other hotels and enjoy the faqcilities perhaps the larger hotels/larger pool area might be the better option.