@vaendryl : in shield hero, the heroes were not party, and Naofumi was not kicked out, in fact there was a reason that they could only cooperate during the waves. He was framed by a corrupt king (acting as regent while the real monarch was away on important diplomatic matters) and church. The persecution was literally an act of Treason. The MC here is just booted from the party, he was not booted from the guild or ostracized from society, which would be necessary for that point to be true.
Naofumi was not considered defective, there was an entire country worshiping him as a god, it was that no one wanted to party with him because of the king and the church. Heck after the frame job other countries tried to recruit him immediately and Naofumi did not notice due to his massive mistrust. Plus the main reason Naofumi was successful was that he used his head and tactics on top of actually training to use his skills well. If any one of the other 3 had half his brain they would have outclassed him by a large margin .
Plus the MC has a long history of competence, he has been going into dungeons for years, and this is a
recent problem. There is only a very small group claiming he is incompetent.
Overpowered loli is a trope in Japan at this point.
The similarities you are seeing are thin or tropes in their own right. The story is not an obvious knockoff, you are overstretching and misinterpreting things to make is one in your head. Heck the use of combat roles makes this look to be more inspired by MMORPGs
and table top RPGs then anything else. With the author writing a story where the Tank is the real hero, not the DPS idiots everyone wants to play, and a proper tank is a heavily armored tough as hell shield user with little direct damage capabilities. Plus booting from the "hero" party is pretty much a webnovel trope and/or fad when the author started writing last year.