the first one, yes, maybe. At that point we had no idea what was going on other than the horror stories coming out of Italy, no vaccine, not enough PPE to go round, no idea of the best treatments, or how it spread, etc. Plus there were some benefits (like a move to remote working) that came out of it.
Whether the following ones were needed in the same way, I don't know, and the splitting local areas into 'tiers'/rules like staying within your county boundary seem mad looking back on it.
I think all the 'we just have to make it to Christmas' in 2020 and then inevitable last minute back tracking was a mistake - if it had been 'we will just have to accept this is not going to be a normal Christmas but it's only one year,' it might have been better.
Then there were significant restrictions in Wales (and I think Scotland) around Christmas 2021 that weren't in place in England - including even outdoor, fully spaced out activities like light trails, which I think were completely unnecessary as there was no measurable difference in infection/death rates (in fact we might have even been higher).
I also think they should have introduced single people being allowed to bubble much earlier - it wasn't until October it was allowed in Wales.