Does anyone else find it difficult when their partner has previous relationship trauma?

Me and my boyfriend have been together for 1 year now. He treats me like an absolute princess and is the best partner I have had. Over the last few months we have started bickering over things I would consider small and no need for an argument however sometimes my partner doesn’t feel the same way. It tends to start with him getting frustrated by something that I have done or said when I haven’t meant anything by it, for example we were walking round the shop the other day deciding what to have for lunch he was walking me down to an isle to show me rather than just tell me what he wanted to do and on the way there waking past the bread isle I thought of something we could do with something really nice I’ve had before therefor I was just excited to share my idea with him. Rather than taking it as helpful me sharing an idea he said he found it rather rude and like I didn’t care at all about what his idea was and just wanted to completely dismiss it. Which turned into him saying right ok I won’t tell you what I was thinking about now cos I can’t be bothered now you’ve done that. This has happened a couple of times about small things, Which is incredibly frustrating for me when I haven’t been rude or horrible in anyway. Following talking about it he said it’s to do with how he has been previously treated and is a protective way for him to not be undermined or belittled again by anyone. I try and understand as much as I can not gonna through anything like that before but I can’t keep getting told I’m doing something wrong when In my eyes I haven’t been rude or anything at all, which if I had I would put my hands up to.
Just wondered if anyone else has been through anything similar

Does anyone else find it difficult when their partner has previous relationship trauma?
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