Am I being harsh?

We’re on a uk holiday. My son has basically had a meltdown at every activity over being ‘bored’, not wanting to share, wanting to do something his way that’s unsafe, etc. Today I had enough. So I said we’re going home and took him back to the accommodation. My partner said I was being too harsh and said he can go to soft play but I said no, he doesn’t get to behave like that then be rewarded with soft play after. If I warn you’ll go home, I need to follow through with it. Am I being too strict? I just feel like his behaviour is worsening.