Split layers and belts are tighed


It’s been a few months since I’ve experienced this issue, not sure what changed or why is happening but I’m about to take a bat to my ender 3D pro, I’ve had it for 3 years now and never had any issues until now.
The belts have been tighter to the maximum, the nozzle changed twice already and both times it wasn’t clogged, I use Cookiecad filament and have a filament drier, slice on cura and have a MacBook. I have tried pursa but i’m not sure what setting to use as I printed a test and the walls were split on some parts.
Any advice will be greatly appreciate it as i depend on this printer to create cutters for my cookie classes.
P.s i have purchased files online and those are not splitting. Some parts have a few bumps or rough areas but no splitting. Tried uploading a picture but i can’t