hello Lisa
a warm welcome to TP
it's so tough, isn't it, having made the difficult decision that it is time for a move into a care home, to then have to come to terms with the aftermath - much sympathy
it is very early days and it may be that your mum will settle more as she gets used to her new surroundings, after all this is a massive change for the both of you and it takes time to establish new routines
it may also be that your mum is using you as her scape goat, throwing all the negatives your way, yet when you aren't there she is pretty accepting of her new home - have a chat with the carers and ask how she is generally, it can be quite surprising that new residents behave very differently for family than during the rest of the day
try visiting at different times, maybe an hour before an activity so your mum can go to the activity before you leave - sometimes it's even advised not to visit too often to allow the new resident to get used to being in their new home
whatever else, know that you did all you could to provide care for your mum in her home and it's a wise person who sees that this just is no longer enough and finds a suitable new home - it comes down to making sure your mum has what she needs, which sadly may not be exactly what she wants - so hit the guilt monster for six
best wishes