Better mechas
 

Why we don't have good mechas like in the 80s and 90s ?

Define good mecha.

Mechas like the 80s and 90s don't talking or childish too much.

There have been plenty of good mecha in the 2000s onwards.

Honestly, judging by a lot of your posts recently the problem seems to be you're growing up and the franchise isn't. The demographic's wants have changed and the kidder things are, the better probably.

"Good" & "better" mecha is 100% objective. Blanketly saying old stuff is better and questioning why new stuff isn't is a matter of opinion.

I like the mechas of timeranger until hurricanger and dekaranger.I don't like the mechas of goseiger until ToQger.

The mecha talk or are sentient because they're actually important now.
They're not just "Last five minutes of the show? Oh shit! Call mecha, token finisher! End episode!" like a shitton of series used to do.

Concerning a design aesthetic, they're definitely upping their game vs the cardboard box robos you consider "Better."

I like the sentient mechas from zyuranger and kakuranger but they was deities not childish from go-onger.

So because they're deities and not just regular living beings from an alternate dimension (Go-Onger) you don't like them? Don't take this the wrong way but what's the difference? They're both living things.

Yes but zyu and kaku mechas hadn't big eyes like animes.