rapid indexer having it as a side mode was always gonna be shaky, when the main product is indexing the ctr part is the first thing that gets dropped.
id stay away from smm panels for this, most of that is bots on cheap proxies, google either filters it or you get a spike and then a drop.
ive been using jake's click farm for this, ctr service by jake lam, its web based like you want, real people doing the searches and clicking through, you just send the keywords and urls. works best on stuff already sitting on page 1-2, id start small on a few keywords and watch gsc before scaling up.