I think this does matter actually. It is a reflection of how well he knows and understands you, and that is something that is really important in your life together, for both of you.
I, like many others on this thread, would have hated a planned, overdone proposal, and was really happy to be asked over a morning cup of tea in bed.
BUT, and this is a big but, you did hope for something more. And that is okay. People can sneer away, and act as if they have no idea what “decor” can possibly mean, or talk about chavs and influencers… but the more important point her is that you did feel disappointed and it does still bother you, and your DH either didn’t know it didn’t care, and that does matter.
Some people really like to make occasions out of things, for themselves and others. Some people are materialistic, others pride themselves on not caring about that stuff. Some people are into fashion and expensive handbags, others think that’s silly…some people like big lavish weddings, others want 10 guests only… and I could go on.
If you were my daughter, I’d be asking if you think you and your DH have the same values in life, if you feel seen and appreciated and if you have the same plans for all of your future and life together, if you know each other really well - I have a feeling this won’t be the only way your DP disappoints you if you stay together. It doesn’t mean that there is anything wrong with him though, and it doesn’t mean there is anything wrong with you, you might just both be better off with other people.
Life is short, if you want decor and bells and whistles romance and stories to tell about it, just go out and enjoy it and find a partner who wants to do that stuff with you and loves surprising you and seeing your reaction - it’s okay to be honest about what you want.