I don't see anything wrong here. If you take one player with 200k/week salary and nothing else you will continue to lose in this way, then also the tactic you've used is not the best one when you've just one good player on the field, you've probably players with low penetration and HA and they're making tons of fauls. I think you've to change a lot in your team if you wanna be more competitive ;)
1990-2022 Stalinorgel - https://www.youtube.com/watch?v=pV-Xppl6h8Et