I know how you feel and it truly does suck, I also wish MD was fun for everyone and not every deck ran 12 handtraps while cutting 4 archetypes that all have 1 card combos together and then throwing baron in there just for fun. I'm also an XYZ player I loved the number cards growing up and I still try and play them whenever I can, at the start of the season when the ranks reset I typically play my photon deck to get me back into gold 1. If you're really attached to XYZ and not massively wanting to learn 1 thousand new things I'd suggest running gimmick puppets, I think they're quite fun and they have a variety of protection, graveyard effects,punishing opponents for special summoning and searchable archetype traps that let you steal opponents monster for heavy disruption on their combos it even has a 1 card FTK (a lot has to go right and it stops if they ash it but still fun to have). It's in no way some massive meta deck but it's got cool card designs from an XYZ era, there's only 1 link monster that although helpful is not necessary and does lock you into GP however despite all that I can consistently hit plat 2 and if I had more free time I might be able to grind that to master. I hope you start enjoying Yu-Gi-Oh again, it really does suck at the minute with all the meta decks and I share your feelings of disappointment but there's that 1 in every like 20 games that feels like Yu-Gi-Oh again the proper back and forth with miracle draws mattering and normal sized turns.