its funny cause this actually happened to me was on gym A for 3 years the basically molded me and made me the little cheerio i am today excellent coaches that let me travel with them when my parents couldnt, i then moved away for 2 years and moved back to a similar area they expected me to be able to just join back up like everything was the way it was and blah blah blah, i had however grown out of the gym the things they did for me was fantastic and i will never forget it but i myself needed a gym where i could start fresh work my way up for respect, travel and compete at a higher level that i thought was necessary, yeah the owners did understand the decision i made and it hurt them a lot when i went to gym B like coaches un-friending me athletes deleting me but those ones i was always close with stuck by and supported my decision, what i am trying to say is you were at gym A for x amount of reasons, and for whatever reason, whether you know it or not gym B is the place for you to be, things always happen for a reason <3
best of luck this season, i wish you the best :)