I think it depends on why you left?
You mention in your post that you enjoy the bond with the children and that is absolutely the very best part. I'm secondary rather than primary but it's the same - being in the classroom with the pupils, interacting with them at break etc is the best bit of the job.
That said, as others have said, it is only one part of it these days.
The SEN crisis is absolutely out of control - EHCPs being rejected, so kids who desperately need support can't get it, lack of specialist provision, lack of funding meaning you can't have as many TAs as you would like. Ours are worth their weight in gold, but when there are 3 children with EHCPs in a class plus 6 SEN K (this is literally one of my classes) and then 11 others, one TA is not enough.
Behaviour is massively more difficult than it used to be and in some schools, it's horrendous. I am extremely fortunate that behaviour at my school is genuinely excellent (despite us being in one of the most deprived areas in the country). However, it doesn't come easily and we work so hard to achieve that - we do line ups in the morning, after break and after lunch- so we as teachers have to collect classes. Whole school routines are extremely tight and we don't let anything slide. Lunch is short-30 minutes, so there is little breathing space in a day. It does make teaching enjoyable as behaviour is great, but it is absolutely relentless and exhausting.
Then there is Ofsted and the hideous pressure for progress and results. I lead a core subject and as a Head of Department, the pressure is insane 😔 I have many a sleepless night because of the worry 😟
I do absolutely love teaching and I am lucky to work in a great school but unless you desperately want to go back, I would think very carefully!