I get that you want someone to blame for what kids missed out on,
*@Swayingpalmtrees*, but classroom teachers did not choose whether schools were open or not, or have any control over how the senior leaders of their schools tackled online learning, provision for keyworkers' children or anything else to do with covid measures.
Blaming them for using any increased leisure time which some of them might have had (before full-on distance learning was up and running, or if their school did not provide full-on live lessons etc) is completely unreasonable. What were they supposed to do - sit around looking miserable?
At the end of the day, you might be furious that some teachers were scared and didn't want schools to re-open, and it may have pissed you off that some posted pictures of themselves enjoying their leisure time during lockdown, but those things made sod all difference to what children did or didn't miss out on, because teachers didn't have the power to decide what happened.
And, as has been pointed out, most of them were delivering online teaching (many while trying to look after their own children, as were lots of other workers).