Like... The only thing that I could even possibly accept from that match as possible throwing is when they accidentally ran double sniper on last (alfa + kev spawned on sniper at the same time and played in both spawn doors [LINK]). However, even if this was the case, typically what would happen is that if this double sniper had impact on a round and led to a round win for Ford, that round or the match in general would then be overturned, not counted as throwing or whatever because you can do this without throwing, shocking I know.
Delving a little bit deeper into this double sniper and how we can see if the snipers even had some sort of impact. When the snipers were both up, alfa was the only one to take a shot and possibly force Witness as they walked through the 4 Door in lobby, using uber in the process. If we want to believe that they actually wanted to milk through this door and not use but had to due to sniper, then sure that can be argued, but typically you tend to pop through this doorway to ensure nobody dies to traps and the like. Kev on the other hand had not taken a shot until after alfa was off sniper, he missed and Witness capped the point nearly instantly, so neither sniper even slowed this push and their impact on this fight can be seen as minimal-to-none as the same outcome came out of it, Ford lost the round (Also if we try to argue that Witness rotated to lobby due to seeing kev sniper, ash only saw alfa on sniper who took the first shot at him, that is what most likely caused a rotate if they weren't already planning to go through lobby anyways).