I was play cash game NL 1,2 in poker 888

had 77 i raise 3bb then the flop came T27
he bed 40% of his stack then i go all in turn came T277 and the river came T277T

can you i have advice i play my hand bad or i shouldn't go all in?

how its possible 2 player had both 4 of kind this for me is looks like not really right?

i seen only on pokerstarts 3 players had straight 2 players had 3 of kind
and that way i decide to move to poker 888 but is look they all poker room are the same

can someone tell me where is my mistake i always play when i had 2 player or 3 of kind or flush or straight but always 50% of the tame i been beat from someone!