Anyone noticing that tomatoes etc are going mouldy early.

No, it’s not just you. We eat a lot of tomatoes, I keep some out and put the rest in the fridge and replace the ones we eat at room temperature with the ones from the fridge. Recently I have noticed that the tomatoes are going soft and squishy within a few days and they don’t taste very nice. I usually then freeze them. But it means we don’t have fresh tomatoes until I go shopping again.
I have noticed that the vegetable section in our local supermarket is a lot colder than it used to be and wondered if that was the cause?

No it’s not just you everyone I know complains about fruit and vegetables they have bought from various places. I grow a fair bit of veg myself and it usually lasts quite well. I think the stuff in shops is waiting too long in warehouses for transport and distribution.
I have been to shops and complained about use by and sell by dates well out of date on perishable cheeses meats etc. The poor excuse given to me was lack of staff. So the lack of staff gives shops the excuse to sell unfit food to its customers its not good enough.