AIBU to complain about this busdriver? (pushchair related)

[candlelight2012]

Would appreciate some opinions before complaining as I'm unsure whether or not he was correct

There was a mother with two young children, one about 2/3, one about 8/9 months (going by eye) with a buggy in upright position in the buggy spot, and the older child on a seat younger one on her knee.

Bus stopped to change drivers and new driver got on the bus and told the women she had to fold the buggy up and move seats as another buggy was coming on.

The new family, mum dad and baby about 7 months, with downs syndrome got on and waited for the mum to fold the buggy and move.

The mum and passengers were all saying to the bus driver that the new passengers should surely be the ones to fold the buggy as they were coming on second, the driver didn't address anyone apart he mum and started raising his voice and hurrying her to move

This took about 4 mins and the mum was in tears by the end of it.

i've quite often been in the position of the first mum. two kids and no car, shopping needs doing by bus. So I get the bus to do my shopping and so need buggy to carry shopping, baby and potentially tantrumming toddler refusing to walk any further and needing buggy board. Do shopping, wait for bus, breath sigh of relief that there's nobody on it already and we don't have to wait twenty minutes for next bus. sit down, toddler sits next to me and baby instantly starts screaming to sit on my knee. So I placate the baby, and technically the buggy is empty. But I'd definitely start crying if someone made me fold it at that moment. FFS that's awful.

The bus driver could have offered to hold the baby or to have folded her pushchair for her.

This is what I don't understand - the op said the driver and dad from second family were trying to help fold it? And second mum offered to hold the baby.

The second family had a disabled child, so they had every right to not have to fold!