The OP didn't ask just a single 'yes or no' question, he asked a series of questions in the form of two paragraphs. Needless to say, a series of questions requires a series of answers. One of the questions was even Every response so far fits into answering that questions. So STFU, no one is making fun of you for having a Mongoose, but we aren't going to lie to the OP about quality just so you don't get your little feelings hurt.

And to add insult to injury, I'll go ahead & back what they're saying about the x-mart level Mongooses with a personal experience. When I was ten years old (y2k) my parents got me a Wal Mart level Mongoose 'freestyle' BMX bike to start racing BMX with. It lasted me all of about 6 races, & only one crash. Went over a double & tried to clear it, but came up short & hit my front tire on the back of the transition. Totally destroyed my front tire, which was no surprise, but it also managed to bend my crank back so far I couldn't move it & it trapped my ankle between the crank arm & the frame. They had to come out with a crow bar to pry it open, which was also surprisingly easy, because the crankset was crap & bent easily. Also bent my handlebars forward & turned the front sprocket into a wobbley turn-table. All this from a ten-year-old kid crashing the bike, which should give you an idea of how fast I was going & how much weight I put on the bike.

Immediately after that, my parents took me to the LBS & got me a Redline Proline Expert. Solid bike, I just sold it this time last year & rode it around beforehand, still supported me at 140# no problem, even with a weight limit of 120#. I gave that bike SO much more abuse than I ever did the Mongoose, & never had a single problem with it.