Sorry if this is long and probably quite boring! The organisation (1) I work for is contracted to another organisation (2) to fulfil a service for them. I am one of a team of what should be 10. For various reasons at the start of the Covid situation I was one of only two members of staff actually physically in organisation 2 to fulfil the duties of our contract. The work we do can be quite emotionally demanding and has a significant human cost if not achieved. The other members of staff were not able to physically attend work, either due to shielding or childcare (although the latter is a choice as we are keyworkers so our children get a place in school).
As time has moved on we are now working on a shift system. I am now part-time (having been full-time at the start to help with the workload) and am in organisation 2 working three full days per week. My other part-time colleagues are also in three full days per week with me although they are both administrators rather than hands on workers. Out of the six other full-time hands-on workers, four of them are in for the other two days per week, one is still shielding and one is only in one day per week with me. They are all still being paid for full-time working and our job is not one that can be done remotely (we can do training etc but not fulfil the terms of our contract). I feel like the situation has been managed poorly from the outset with absolutely no consideration for the stress this places on me. It has been set up like this to accommodate everyone else's needs but as I was in from the start I have not once been considered or consulted about the impact on me. I am really good at my job and I think just expected to get on with it. My manager works remotely anyway so I never actually see her.
I have a particular issue with the colleague who is only doing one day per week. Our whole working pattern has been set-up around her needs. She is a single parent to two primary school aged children. She was very averse to putting them in school as she said she felt vulnerable to Covid as she was on her own. I completely understand this but as things have progressed she has not felt so vulnerable that she hasn't taken her children to crowded areas for day trips - a street party at the start, ikea, the beach and most recently to a large attraction. All of this has been shared in pictures on Facebook including the latter where she was stood in a large queue surrounded by people. I feel like she is royally taking the piss and I am getting increasingly resentful especially I am the one having to pick up her work whilst she is getting paid near double what I get for doing nothing. I have raised this in a review but got talked down with "other people's circumstances are not my business". FWIW I have also 4 children including primary age and my dh is working full-time.
It should also be noted our jobs are secure and on fixed term contracts.
So AIBU to feel aggrieved by this whole situation or am I a miserable cow with lacking in empathy? I feel like I've lost all perspective due to the stress.