No you're not, this happens to everyone, most long term FMers (including myself) think FM19 is the worst FM ever released hence I've stopped playing as much as the ME is shocking however happy to help. There's a couple of things I found useful to try and counteract this. Firstly try a different tactic, if you've the players for a 442 then try playing another tactic from the forum or from the FM Arena/MR L tactic leagues (links below) for a few games then go back to TFF but the most effective was changing the DL/LoE both to standard to draw the opposition out of their shell, it can also work with just moving the DL to higher as opposed to much higher. Note that's there's no panacea to breaking down buses and it's sadly just trial and error as every team will have their own version of bus type of tactics.Am i the only one who faces tactics work great for 15-20 games and then following games finish with either lost or draw.
How do you manage to use the tactics for seasons and seasons?
In addition to the above I also found Clash's 442 excellent against bottom half teams who take park the bus to the extreme: https://fm-arena.com/topics/276-19-3-CLASH-442-V4/page-0.html