Hand 1: One thing good lags do is not turn their hand into a bluff. By raising turn here that's exactly what u turn it into and it def has SD value. You should call flop and fold turn here IMO unless villain is a habitual bluffer or grossly overplays small PPs. Bluff raising flop with sayyy 46s is also fine imo but ur hand is waaaay too strong to turn into a bluff.

Hand 2: This is also rly bad. Don't raise preflop here unless villain is super passive (postflop-as in folding mid pair to a Cbet), if u plan to raise pre do it to 5 or 6. As played ur flop lead is good, you should insta fold to this raise OOP. I'm not even gonna start with the many reasons y u should, but for starters villain's range connects hard here (7T, 75, 89, sets, combo draws). This is terrible spew.

Hand 3: Call preflop is pretty bad imo, slightly better if hero is otb and therefore BB should be 3betting significantly lighter, though its still probably a fold vs most tags with these stacks. Flop is good. You can induce a few mistakes here and you have 0 implied odds. A fold isn't terrible either, but I think a push>fold>call.