What you're describing goes way beyond normal jealousy, you know. Being jealous once in a while is normal, everyone does it, but when he starts getting upset about photos of you with your girlfriends, gets bothered when you like another guy's post and then asks you to delete an entire social media account... that's not just jealousy anymore, that's actual control. And usually it escalates if you give in - first it's Instagram, then it's WhatsApp, then it's that friend he thinks is sketchy. It starts subtle but it's a pretty classic pattern of a toxic relationship.
The real issue here is that you're having to give up things that are yours to satisfy him. Instagram is a way for you to connect with people, share moments, exist socially. You spent two years with someone who should trust you, and trust doesn't mean you disappear. If he actually believed in you, it wouldn't matter how many photos you post or which posts you like - that wouldn't affect your relationship. The fact that he thinks it does is pretty concerning.
I'd suggest you have a serious conversation with him about this. Make it clear that you're not going to delete your account because he asked you to, that a healthy relationship is built on trust and respect for each other's choices. If he keeps pressuring you or if this becomes a pattern in other areas of your life, then you need to think about whether you really want to keep investing in this. Sometimes you love the person, but love isn't enough reason to accept disrespect.