Well hard to say. It is stupid for sure, but if game is lost (loosing all cp + facs hard to get back - not impossible but hard) it's not important (this changes nothing in the end). It's still stupid but how is it sabotage if the game can't be won? And even if the game can be won, sometimes upgrading creeps can help team. Try in qualify to up creeps attack 5 or 6 times at a time and see the difference it can make on the game (ofc if you do it before all opponents got tier 3 tanks)... It all depend on the way game is going on imo, but i can't see any sabotage in it (it's oly my opinion). Sabotage could have been if guy sell all to make those ups for example, or make a game lost because stupid ideas in purpose. If the guy doesn't really know how the game works, then it's not a real sabotage (just my opinion again)...
Imo sabotage is making team loose a game in purpose, whatever way used by the player to do so.
Imo sabotage is making team loose a game in purpose, whatever way used by the player to do so.