Things like ScarfChomp and RP Landorus can outspeed your entire team and devastate it with a powerful Earthquake. You have no solid resist (Accelgor does not count) and they can win the game by spamming their STAB move. I'd invest in a good ground immunity like bulky Rotom-W that can continually switch into Gliscor and Skarmory that wall Toxicroak.
I also don't like Tentacruel on this team at all to be honest. None of your team is sr weak and Toxicroak can absorb T-spikes. It just sits there, adds weaknesses, and lets dangerous things like Lucario set up.