You need to work on your starting hand selection. In most games, Ace Ten is a rag ace. Also you appear to overvalue hands like KQ, KT, KJ, those hands are very easily dominated and if you do play them you'd better hope the opponents didn't hit the flop with you, or that nobody hit the flop so you can c-bet. Also you talk about playing stuff like Q2 suited or J6 suited. Well thats OK but if you're going to play that in late position you might as well play every hand, and then you're going to get resteals preflop from the big blind left right and centre if he has a clue.
You should try to avoid playing small pairs and suited connectors with a view to outdraw your opponent in most tournament situations since you rarely are receiving the correct express odds
to hit the right kind of hand on the flop (you want to make more than one pair), and even more rarely are you receiving the implied odds. That is, your opponent and yourself are not deep stacked enough to pay you off sufficiently when you hit your hand to soften the blow of not having the correct express odds to hit your hand. Generally you need to both have a stack size an amount at least 20 times the bet you called to make a good profit in the long run, so you're better off making these kind of plays in a cash game where everyone is deep, and preferably where the opponent often overvalues top pair or a 'small hand'.
Also your preflop strategy of raising with the very strong hands and calling with reasonable hands is not good either - you should try to raise - and the same amount - whether you have 32 off suit and decide to steal the blinds or if you have those Aces. Then it'll be harder to put you on a hand. Otherwise people will know when it comes 732 and you start putting in a lot of action but limped preflop, that you probably have a set.
Also your range of hands should widen the closer you are to the button. For example, I would never play A6 off suit in 80% of the positions at the table unless it was really shorthanded. But when its all folds to me on the cut off, I'm going to raise with that A6 off suit, chances are its better than the 3 hands that the button and blinds have and your raise wins you position if the blinds decide to call. Mostly the blinds will just check and you can take it down with a decent bet, even though mostly you flop nothing. And if the button calls then you can c-bet and take it down, or maybe checkraise bluff the turn if he thinks he can float you (standard play when being floated, not many people know that, and they haven't tried refloating yet). Also don't make minimum bets or raises, these are really bad plays with only a few strategic exceptions, like you have two Tens and want to isolate an early raiser but don't want to overly pump up the pot size, so then you make the minimum raise preflop so when the early raiser calls you can C-bet it an amount that would've pot committed you had you 3-bet a proper amount preflop.
You said you're losing confidence in yourself when you get bad beats. Just go to any poker calculator, run the hands against each other and then you know what the score is. You know whether you got your money in good or not, and then you know to do it again and again and again in the future.