After a bit of research i ended up with following:
restic -r rclone:gdrive_my:GdriveBups-Tmp -o rclone.args="serve restic --stdio --tpslimit=10 --drive-chunk-size=256M --drive-use-trash=false --fast-list" -v backup --tag tmp-b k:/tmp/tmp-b
comments and links:
–stdio to run an HTTP2 connection over stdin/stdout i
–tpslimit to limit query rate (default unlimited) i, i
–drive-chunk-size (default 8M) matters for large files i
–drive-use-trash to bypass trash when deleting i
–fast-list i, i
Maybe it will be useful to other newbies like me.
Above command plus creating own google app id solved the errors, now works great.