If you have a PEI sheet, try glue stick on the PEI sheet to print. The glue stick acts as a leveraging agent after printing, you can wash it off with warm water - otherwise the flexibles tend to stick too good and ruin the built plate.
I use this method on my prusa mini for TPU where I had similar issues.
Sticking flexible filament on the textured sheet can be hard, I had success by printing the brim layer in PLA in the past - but that was still on a Makerbot Mk2 which didn’t even have a heated bed.
If you have a PEI sheet, try glue stick on the PEI sheet to print. The glue stick acts as a leveraging agent after printing, you can wash it off with warm water - otherwise the flexibles tend to stick too good and ruin the built plate. I use this method on my prusa mini for TPU where I had similar issues. Sticking flexible filament on the textured sheet can be hard, I had success by printing the brim layer in PLA in the past - but that was still on a Makerbot Mk2 which didn’t even have a heated bed.