How was it stupid?

I'll put it in spoilers just in case anyone doesn't want the details, but:

Cossack comes from an orphanage and witnessed the death of the man who ran the orphanage. In his final episode, he meets a young girl whose father is killed in front of her. Cossack spends the bulk of the episode trying to befriend her and help her heal but she doesn't really trust him, sees him as just another violent person. He decides to meet with her and leaves his suit behind, only to be gunned down in front of the girl.

Like, I can see what he was trying to do but the girl's father was killed by the same enemies and the show doesn't really do anything to address the fact that, yet again, the girl sees someone gunned down in front of her.

Ah, thanks for telling me.

Yeah. Most of the Megazord are portrayed to be as large as all members could fit in the head, but in KyurenOh's case, considering that the cockpit is slightly bigger than a water walking ball, you may think KyurenOh might be the smallest Megazord. Of course the show labels them being 46 meters high, maybe they were magically enlarged.

The 80's and 90's mechas was that bad ?

What do you mean with bad?

Many people complain them to be too blocky.

They certainly were a lot more blocky back then, but that's just how the show progressed. The mechs started off very plain, and became more detailed as time went on. Just look at the difference between the mechs in Changeman/Flashman and the mechs in GoGoV/Timeranger.

That's why i like them, they have no CGI.

Which actor did a good job playing multiple rangers within Super Sentai?
Your choices are:

Hiroshi Miyauchi as Aoranger and Big 1

Kenji Ohba as Battle Kenya and Denji Blue

Junichi Haruta as Goggle Black and Dyna Black

Shiro Izumi as Change Pegasus and Dragonranger

Teruaki Ogawa as Ninja Red and Black Knight Hyuga

Ayumi Kinoshita as Deka Yellow and Kyoryu Cyan II

Hiroya Matsumoto as Magi Yellow and Beet Buster

Masayuki Deai as Bouken Silver and Kyoryu Grey I and II

Mao Ichimichi as Gokai Yellow and Washi Pink