Dante loops and Raiden juggles aren't exactly spam in my mind. Especially if you're playing FFA or 2v2 where both of those are pretty easy to interrupt. Cole's ice and electricity can 100% be spammed though, and of course, Kratos will square.
If you're talking 1v1, they still aren't spam. Any whiffed air up triangle by Raiden can be punished with a raw Murray, assuming you're playing Sly. Empty cancel is a little tougher for Sly to handle though, imo
In pubs you have to do whatever it takes to win, farm AP off the afk guy, spam safe attacks, combo'ing the hell out of the one who doesnt know how to block, glitch all day, etc. Its pubs anyway, if they get all butthurt and ask you to 1v1 then do it, most people on pubs dont even know how to 1v1 anyway except their crappy tactics they learned in FFA lol.
PSN: I-Use-A-Blender i play kratos you wont win spam square everyday